<lensdatabase version="1">
    <mount>
        <name>Pentax K</name>
        <name lang="ru">Байонет K</name>
        <compat>Pentax KA</compat>
        <compat>Pentax KAF</compat>
        <compat>Pentax KAF2</compat>
        <compat>Pentax KAF3</compat>
        <compat>Pentax KAF4</compat>
        <compat>M42</compat>
        <compat>M39/1</compat>
        <compat>DKL</compat>
        <compat>T2</compat>
        <compat>Tamron Adaptall</compat>
        <compat>Generic</compat>
    </mount>
    <mount>
        <name>Pentax KA</name>
        <compat>Pentax K</compat>
        <compat>Pentax KAF</compat>
        <compat>Pentax KAF2</compat>
        <compat>Pentax KAF3</compat>
        <compat>Pentax KAF4</compat>
        <compat>M42</compat>
        <compat>M39/1</compat>
        <compat>DKL</compat>
        <compat>T2</compat>
        <compat>Tamron Adaptall</compat>
        <compat>Generic</compat>
    </mount>
    <mount>
        <name>Pentax KAF</name>
        <compat>Pentax K</compat>
        <compat>Pentax KA</compat>
        <compat>Pentax KAF2</compat>
        <compat>Pentax KAF3</compat>
        <compat>Pentax KAF4</compat>
        <compat>M42</compat>
        <compat>M39/1</compat>
        <compat>DKL</compat>
        <compat>T2</compat>
        <compat>Tamron Adaptall</compat>
        <compat>Generic</compat>
    </mount>
    <mount>
        <name>Pentax KAF2</name>
        <compat>Pentax K</compat>
        <compat>Pentax KA</compat>
        <compat>Pentax KAF</compat>
        <compat>Pentax KAF3</compat>
        <compat>Pentax KAF4</compat>
        <compat>M42</compat>
        <compat>M39/1</compat>
        <compat>DKL</compat>
        <compat>T2</compat>
        <compat>Tamron Adaptall</compat>
        <compat>Generic</compat>
    </mount>
    <mount>
        <name>Pentax KAF3</name>
        <compat>Pentax K</compat>
        <compat>Pentax KA</compat>
        <compat>Pentax KAF</compat>
        <compat>Pentax KAF2</compat>
        <compat>Pentax KAF4</compat>
        <compat>M42</compat>
        <compat>M39/1</compat>
        <compat>DKL</compat>
        <compat>T2</compat>
        <compat>Tamron Adaptall</compat>
        <compat>Generic</compat>
    </mount>
    <mount>
        <name>Pentax KAF4</name>
        <compat>Pentax K</compat>
        <compat>Pentax KA</compat>
        <compat>Pentax KAF</compat>
        <compat>Pentax KAF2</compat>
        <compat>Pentax KAF3</compat>
        <compat>M42</compat>
        <compat>M39/1</compat>
        <compat>DKL</compat>
        <compat>T2</compat>
        <compat>Tamron Adaptall</compat>
        <compat>Generic</compat>
    </mount>
    <mount>
        <name>Pentax 645AF2</name>
        <compat>Generic</compat>
    </mount>
    <camera>
        <maker>Pentax</maker>
        <model>35mm film: full frame</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1</cropfactor>
    </camera>
    <camera>
        <maker>Pentax Corporation</maker>
        <maker lang="en">Pentax</maker>
        <model>Pentax *ist DL2</model>
        <model lang="en">*ist DL2</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.531</cropfactor>
    </camera>
    <camera>
        <maker>Pentax Corporation</maker>
        <maker lang="en">Pentax</maker>
        <model>Pentax *ist DL</model>
        <model lang="en">*ist DL</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.531</cropfactor>
    </camera>
    <camera>
        <maker>Pentax Corporation</maker>
        <maker lang="en">Pentax</maker>
        <model>Pentax *ist DS2</model>
        <model lang="en">*ist DS2</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.531</cropfactor>
    </camera>
    <camera>
        <maker>Pentax Corporation</maker>
        <maker lang="en">Pentax</maker>
        <model>Pentax *ist DS</model>
        <model lang="en">*ist DS</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.531</cropfactor>
    </camera>
    <camera>
        <maker>Pentax Corporation</maker>
        <maker lang="en">Pentax</maker>
        <model>Pentax *ist D</model>
        <model lang="en">*ist D</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.531</cropfactor>
    </camera>
    <camera>
        <maker>Pentax</maker>
        <model>Pentax K-m</model>
        <model lang="en">K-m</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.531</cropfactor>
    </camera>
    <camera>
        <maker>Pentax Corporation</maker>
        <maker lang="en">Pentax</maker>
        <model>Pentax K100D</model>
        <model lang="en">K100D</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.531</cropfactor>
    </camera>
    <camera>
        <maker>Pentax Corporation</maker>
        <maker lang="en">Pentax</maker>
        <model>Pentax K100D Super</model>
        <model lang="en">K100D Super</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.531</cropfactor>
    </camera>
    <camera>
        <maker>Pentax Corporation</maker>
        <maker lang="en">Pentax</maker>
        <model>Pentax K110D</model>
        <model lang="en">K110D</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.531</cropfactor>
    </camera>
    <camera>
        <maker>Pentax Corporation</maker>
        <maker lang="en">Pentax</maker>
        <model>Pentax K10D</model>
        <model lang="en">K10D</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.531</cropfactor>
    </camera>
    <camera>
        <maker>Pentax Corporation</maker>
        <maker lang="en">Pentax</maker>
        <model>Pentax K20D</model>
        <model lang="en">K20D</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.538</cropfactor>
    </camera>
    <camera>
        <maker>Pentax</maker>
        <model>Pentax K-30</model>
        <model lang="en">K-30</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.526</cropfactor>
    </camera>
    <camera>
        <maker>Pentax</maker>
        <model>Pentax K-50</model>
        <model lang="en">K-50</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.526</cropfactor>
    </camera>
    <camera>
        <maker>Pentax</maker>
        <model>Pentax K-500</model>
        <model lang="en">K-500</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.534</cropfactor>
    </camera>
    <camera>
        <maker>Pentax</maker>
        <model>Pentax K-7</model>
        <model lang="en">K-7</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.538</cropfactor>
    </camera>
    <camera>
        <maker>Pentax</maker>
        <model>Pentax K-5</model>
        <model lang="en">K-5</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.526</cropfactor>
    </camera>
    <camera>
        <maker>Pentax</maker>
        <model>Pentax K-5 II</model>
        <model lang="en">K-5 II</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.526</cropfactor>
    </camera>
    <camera>
        <maker>Pentax</maker>
        <model>Pentax K-5 II s</model>
        <model lang="en">K-5 IIs</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.526</cropfactor>
    </camera>
    <camera>
        <maker>Ricoh Imaging Company, Ltd.</maker>
        <maker lang="en">Pentax</maker>
        <model>Pentax K-3</model>
        <model lang="en">K-3</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.534</cropfactor>
    </camera>
    <camera>
        <maker>Ricoh Imaging Company, Ltd.</maker>
        <maker lang="en">Pentax</maker>
        <model>Pentax K-3 II</model>
        <model lang="en">K-3 II</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.534</cropfactor>
    </camera>
    <camera>
        <maker>Ricoh Imaging Company, Ltd.</maker>
        <maker lang="en">Pentax</maker>
        <model>Pentax K-3 Mark III</model>
        <model lang="en">K-3 III</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.546</cropfactor>
    </camera>
    <camera>
        <maker>Ricoh Imaging Company, Ltd.</maker>
        <maker lang="en">Pentax</maker>
        <model>Pentax K-3 Mark III Monochrome</model>
        <model lang="en">K-3 III Monochrome</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.546</cropfactor>
    </camera>
    <camera>
        <maker>Ricoh Imaging Company, Ltd.</maker>
        <maker lang="en">Pentax</maker>
        <model>Pentax K-1</model>
        <model lang="en">K-1</model>
        <mount>Pentax KAF4</mount>
        <cropfactor>1</cropfactor>
    </camera>
    <camera>
        <maker>Ricoh Imaging Company, Ltd.</maker>
        <maker lang="en">Pentax</maker>
        <model>PENTAX K-1 Mark II</model>
        <model lang="en">K-1 II</model>
        <mount>Pentax KAF4</mount>
        <cropfactor>1.0</cropfactor>
    </camera>
    <camera>
        <maker>Pentax</maker>
        <model>Pentax K2000</model>
        <model lang="en">K2000</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.531</cropfactor>
    </camera>
    <camera>
        <maker>Pentax</maker>
        <model>Pentax K200D</model>
        <model lang="en">K200D</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.531</cropfactor>
    </camera>
    <camera>
        <maker>Pentax</maker>
        <model>Pentax K-x</model>
        <model lang="en">K-x</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.531</cropfactor>
    </camera>
    <camera>
        <maker>Pentax</maker>
        <model>Pentax K-r</model>
        <model lang="en">K-r</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.523</cropfactor>
    </camera>
    <camera>
        <maker>Ricoh Imaging Company, Ltd.</maker>
        <maker lang="en">Pentax</maker>
        <model>Pentax K-S2</model>
        <model lang="en">K-S2</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.534</cropfactor>
    </camera>
    <camera>
        <maker>Ricoh Imaging Company, Ltd.</maker>
        <maker lang="en">Pentax</maker>
        <model>Pentax K-S1</model>
        <model lang="en">K-S1</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.534</cropfactor>
    </camera>
    <camera>
        <maker>Ricoh Imaging Company, Ltd.</maker>
        <maker lang="en">Pentax</maker>
        <model>Pentax K-70</model>
        <model lang="en">K-70</model>
        <mount>Pentax KAF4</mount>
        <cropfactor>1.534</cropfactor>
    </camera>
    <camera>
        <maker>Pentax</maker>
        <model>Pentax K-01</model>
        <model lang="en">K-01</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.522</cropfactor>
    </camera>
    <camera>
        <maker>Ricoh Imaging Company, Ltd.</maker>
        <maker lang="en">Pentax</maker>
        <model>Pentax KF</model>
        <model lang="en">KF</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.534</cropfactor>
    </camera>
    <camera>
        <maker>Ricoh Imaging Company, Ltd.</maker>
        <maker lang="en">Pentax</maker>
        <model>Pentax KP</model>
        <model lang="en">KP</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.534</cropfactor>
    </camera>
    <camera>
        <maker>Pentax</maker>
        <model>Pentax 645D</model>
        <model lang="en">645D</model>
        <mount>Pentax 645AF2</mount>
        <cropfactor>0.79</cropfactor>
    </camera>
    <camera>
        <maker>Ricoh Imaging Company, Ltd.</maker>
        <maker lang="en">Pentax</maker>
        <model>Pentax 645Z</model>
        <model lang="en">645Z</model>
        <mount>Pentax 645AF2</mount>
        <cropfactor>0.79</cropfactor>
    </camera>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-DA 12-24mm f/4 ED AL IF</model>
        <mount>Pentax KAF2</mount>
        <!-- Average crop factor of Pentax APS-C cameras -->
        <cropfactor>1.53</cropfactor>
        <calibration>
            <distortion model="poly3" focal="12" k1="-0.01919"/>
            <distortion model="poly3" focal="15" k1="-0.00774"/>
            <distortion model="poly3" focal="18" k1="-0.00345"/>
            <distortion model="poly3" focal="21" k1="-0.00199"/>
            <distortion model="poly3" focal="24" k1="0.00061"/>
            <tca model="poly3" focal="12" br="0.0000916" vr="0.9999904" bb="-0.0002397" vb="1.0006490"/>
            <tca model="poly3" focal="15" br="0.0001253" vr="0.9999184" bb="-0.0002858" vb="1.0008241"/>
            <tca model="poly3" focal="18" br="0.0001204" vr="0.9999075" bb="-0.0001990" vb="1.0006258"/>
            <tca model="poly3" focal="21" br="0.0001063" vr="0.9999562" bb="-0.0001477" vb="1.0005692"/>
            <tca model="poly3" focal="24" br="0.0000982" vr="1.0000005" bb="-0.0001137" vb="1.0004136"/>
            <vignetting model="pa" focal="12" aperture="4.5" distance="100" k1="-0.19267" k2="0.09379" k3="-0.38938"/>
            <vignetting model="pa" focal="15" aperture="4.5" distance="100" k1="-0.08756" k2="-0.28192" k3="0.06908"/>
            <vignetting model="pa" focal="18" aperture="4.5" distance="100" k1="-0.05982" k2="-0.45748" k3="0.25039"/>
            <vignetting model="pa" focal="21" aperture="4.5" distance="100" k1="-0.28874" k2="-0.06687" k3="0.09488"/>
            <vignetting model="pa" focal="24" aperture="4.5" distance="100" k1="-0.44227" k2="0.2599" k3="-0.09436"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-DA 16-45mm f/4 ED AL</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.522</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="16" a="0.01944" b="-0.06046" c="0.03032"/>
            <distortion model="ptlens" focal="20" a="0.00432" b="-0.02027" c="0.02168"/>
            <distortion model="ptlens" focal="23" a="0.00533" b="-0.01583" c="0.0114"/>
            <distortion model="ptlens" focal="28" a="-0.001" b="0.00006" c="0.00659"/>
            <distortion model="ptlens" focal="36" a="-0.00408" b="0.01658" c="-0.01472"/>
            <distortion model="ptlens" focal="45" a="-0.01302" b="0.04714" c="-0.04129"/>
            <tca model="poly3" focal="16" br="-0.0000282" vr="1.0001825" bb="0.0002068" vb="1.0001887"/>
            <tca model="poly3" focal="16" br="-0.0000421" vr="1.0002298" bb="0.0001625" vb="1.0001482"/>
            <tca model="poly3" focal="20" br="-0.0000311" vr="1.0001298" bb="0.0001482" vb="1.0003134"/>
            <tca model="poly3" focal="20" br="-0.0000445" vr="1.0001918" bb="0.0001317" vb="1.0001747"/>
            <tca model="poly3" focal="23" br="-0.0000414" vr="1.0001127" bb="0.0001774" vb="1.0002209"/>
            <tca model="poly3" focal="23" br="-0.0000599" vr="1.0001897" bb="0.0001393" vb="1.0001766"/>
            <tca model="poly3" focal="28" br="-0.0000517" vr="1.0001114" bb="0.0002012" vb="1.0002059"/>
            <tca model="poly3" focal="28" br="-0.0000704" vr="1.0001997" bb="0.0001397" vb="1.0001044"/>
            <tca model="poly3" focal="34" br="-0.0000537" vr="1.0001475" bb="0.0001562" vb="1.0000864"/>
            <tca model="poly3" focal="34" br="-0.0000734" vr="1.0002562" bb="0.0000934" vb="1.0000112"/>
            <tca model="poly3" focal="45" br="-0.0000458" vr="1.0002095" bb="0.0000738" vb="0.9999762"/>
            <tca model="poly3" focal="45" br="-0.0000769" vr="1.0003345" bb="0.0001130" vb="0.9997736"/>
            <vignetting model="pa" focal="16" aperture="4" distance="10" k1="-0.5951" k2="0.3079" k3="-0.2377"/>
            <vignetting model="pa" focal="16" aperture="4" distance="1000" k1="-0.5951" k2="0.3079" k3="-0.2377"/>
            <vignetting model="pa" focal="16" aperture="5.6" distance="10" k1="-0.5278" k2="0.3908" k3="-0.2518"/>
            <vignetting model="pa" focal="16" aperture="5.6" distance="1000" k1="-0.5278" k2="0.3908" k3="-0.2518"/>
            <vignetting model="pa" focal="16" aperture="8" distance="10" k1="-0.4771" k2="0.1809" k3="-0.0448"/>
            <vignetting model="pa" focal="16" aperture="8" distance="1000" k1="-0.4771" k2="0.1809" k3="-0.0448"/>
            <vignetting model="pa" focal="16" aperture="11" distance="10" k1="-0.4702" k2="0.1595" k3="-0.0303"/>
            <vignetting model="pa" focal="16" aperture="11" distance="1000" k1="-0.4702" k2="0.1595" k3="-0.0303"/>
            <vignetting model="pa" focal="16" aperture="16" distance="10" k1="-0.4730" k2="0.1620" k3="-0.0310"/>
            <vignetting model="pa" focal="16" aperture="16" distance="1000" k1="-0.4730" k2="0.1620" k3="-0.0310"/>
            <vignetting model="pa" focal="16" aperture="22" distance="10" k1="-0.5023" k2="0.2490" k3="-0.0920"/>
            <vignetting model="pa" focal="16" aperture="22" distance="1000" k1="-0.5023" k2="0.2490" k3="-0.0920"/>
            <vignetting model="pa" focal="20" aperture="4" distance="10" k1="-0.4957" k2="-0.0157" k3="0.0700"/>
            <vignetting model="pa" focal="20" aperture="4" distance="1000" k1="-0.4957" k2="-0.0157" k3="0.0700"/>
            <vignetting model="pa" focal="20" aperture="5.6" distance="10" k1="-0.4598" k2="0.2636" k3="-0.1560"/>
            <vignetting model="pa" focal="20" aperture="5.6" distance="1000" k1="-0.4598" k2="0.2636" k3="-0.1560"/>
            <vignetting model="pa" focal="20" aperture="8" distance="10" k1="-0.4447" k2="0.1517" k3="-0.0285"/>
            <vignetting model="pa" focal="20" aperture="8" distance="1000" k1="-0.4447" k2="0.1517" k3="-0.0285"/>
            <vignetting model="pa" focal="20" aperture="11" distance="10" k1="-0.4508" k2="0.1707" k3="-0.0429"/>
            <vignetting model="pa" focal="20" aperture="11" distance="1000" k1="-0.4508" k2="0.1707" k3="-0.0429"/>
            <vignetting model="pa" focal="20" aperture="16" distance="10" k1="-0.4144" k2="0.0838" k3="0.0100"/>
            <vignetting model="pa" focal="20" aperture="16" distance="1000" k1="-0.4144" k2="0.0838" k3="0.0100"/>
            <vignetting model="pa" focal="20" aperture="22" distance="10" k1="-0.4438" k2="0.1571" k3="-0.0392"/>
            <vignetting model="pa" focal="20" aperture="22" distance="1000" k1="-0.4438" k2="0.1571" k3="-0.0392"/>
            <vignetting model="pa" focal="28" aperture="4" distance="10" k1="-0.7087" k2="0.3645" k3="-0.0867"/>
            <vignetting model="pa" focal="28" aperture="4" distance="1000" k1="-0.7087" k2="0.3645" k3="-0.0867"/>
            <vignetting model="pa" focal="28" aperture="5.6" distance="10" k1="-0.3780" k2="0.1283" k3="-0.0649"/>
            <vignetting model="pa" focal="28" aperture="5.6" distance="1000" k1="-0.3780" k2="0.1283" k3="-0.0649"/>
            <vignetting model="pa" focal="28" aperture="8" distance="10" k1="-0.3917" k2="0.1318" k3="-0.0263"/>
            <vignetting model="pa" focal="28" aperture="8" distance="1000" k1="-0.3917" k2="0.1318" k3="-0.0263"/>
            <vignetting model="pa" focal="28" aperture="11" distance="10" k1="-0.4006" k2="0.1571" k3="-0.0466"/>
            <vignetting model="pa" focal="28" aperture="11" distance="1000" k1="-0.4006" k2="0.1571" k3="-0.0466"/>
            <vignetting model="pa" focal="28" aperture="16" distance="10" k1="-0.3858" k2="0.1389" k3="-0.0404"/>
            <vignetting model="pa" focal="28" aperture="16" distance="1000" k1="-0.3858" k2="0.1389" k3="-0.0404"/>
            <vignetting model="pa" focal="28" aperture="22" distance="10" k1="-0.4026" k2="0.1577" k3="-0.0447"/>
            <vignetting model="pa" focal="28" aperture="22" distance="1000" k1="-0.4026" k2="0.1577" k3="-0.0447"/>
            <vignetting model="pa" focal="34" aperture="4" distance="10" k1="-0.7832" k2="0.5570" k3="-0.2054"/>
            <vignetting model="pa" focal="34" aperture="4" distance="1000" k1="-0.7832" k2="0.5570" k3="-0.2054"/>
            <vignetting model="pa" focal="34" aperture="5.6" distance="10" k1="-0.3140" k2="0.0524" k3="-0.0480"/>
            <vignetting model="pa" focal="34" aperture="5.6" distance="1000" k1="-0.3140" k2="0.0524" k3="-0.0480"/>
            <vignetting model="pa" focal="34" aperture="8" distance="10" k1="-0.3373" k2="0.1075" k3="-0.0251"/>
            <vignetting model="pa" focal="34" aperture="8" distance="1000" k1="-0.3373" k2="0.1075" k3="-0.0251"/>
            <vignetting model="pa" focal="34" aperture="11" distance="10" k1="-0.3550" k2="0.1421" k3="-0.0442"/>
            <vignetting model="pa" focal="34" aperture="11" distance="1000" k1="-0.3550" k2="0.1421" k3="-0.0442"/>
            <vignetting model="pa" focal="34" aperture="16" distance="10" k1="-0.3778" k2="0.1737" k3="-0.0563"/>
            <vignetting model="pa" focal="34" aperture="16" distance="1000" k1="-0.3778" k2="0.1737" k3="-0.0563"/>
            <vignetting model="pa" focal="34" aperture="22" distance="10" k1="-0.3715" k2="0.1674" k3="-0.0556"/>
            <vignetting model="pa" focal="34" aperture="22" distance="1000" k1="-0.3715" k2="0.1674" k3="-0.0556"/>
            <vignetting model="pa" focal="45" aperture="4" distance="10" k1="-0.9029" k2="0.8737" k3="-0.3876"/>
            <vignetting model="pa" focal="45" aperture="4" distance="1000" k1="-0.9029" k2="0.8737" k3="-0.3876"/>
            <vignetting model="pa" focal="45" aperture="5.6" distance="10" k1="-0.2032" k2="-0.3004" k3="0.1784"/>
            <vignetting model="pa" focal="45" aperture="5.6" distance="1000" k1="-0.2032" k2="-0.3004" k3="0.1784"/>
            <vignetting model="pa" focal="45" aperture="8" distance="10" k1="-0.2982" k2="0.1466" k3="-0.0739"/>
            <vignetting model="pa" focal="45" aperture="8" distance="1000" k1="-0.2982" k2="0.1466" k3="-0.0739"/>
            <vignetting model="pa" focal="45" aperture="11" distance="10" k1="-0.2854" k2="0.0981" k3="-0.0310"/>
            <vignetting model="pa" focal="45" aperture="11" distance="1000" k1="-0.2854" k2="0.0981" k3="-0.0310"/>
            <vignetting model="pa" focal="45" aperture="16" distance="10" k1="-0.3005" k2="0.1256" k3="-0.0414"/>
            <vignetting model="pa" focal="45" aperture="16" distance="1000" k1="-0.3005" k2="0.1256" k3="-0.0414"/>
            <vignetting model="pa" focal="45" aperture="22" distance="10" k1="-0.3143" k2="0.1365" k3="-0.0417"/>
            <vignetting model="pa" focal="45" aperture="22" distance="1000" k1="-0.3143" k2="0.1365" k3="-0.0417"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>HD Pentax-D FA 15-30mm f/2.8 ED SDM WR</model>
        <mount>Pentax K</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- This is an exact copy of Tamron SP 15-30mm f/2.8 Di VC USD
                 (A012)
                 -->
            <!-- Taken with Nikon D750 -->
            <distortion model="ptlens" focal="15" a="0.00365" b="-0.0373" c="0.04147"/>
            <distortion model="ptlens" focal="18" a="0.00298" b="-0.02252" c="0.03197"/>
            <distortion model="ptlens" focal="20" a="0.00184" b="-0.00975" c="0.01751"/>
            <distortion model="ptlens" focal="24" a="-0.00091" b="0.0071" c="0.00024"/>
            <distortion model="ptlens" focal="30" a="0.00987" b="-0.02288" c="0.02592"/>
            <tca model="poly3" focal="15" vr="1.0002123" vb="1.0000492"/>
            <tca model="poly3" focal="18" vr="1.0001493" vb="1.0001207"/>
            <tca model="poly3" focal="20" vr="1.0000941" vb="1.0001934"/>
            <tca model="poly3" focal="24" vr="1.0000410" vb="1.0001929"/>
            <tca model="poly3" focal="30" vr="1.0000710" vb="1.0000933"/>
            <!-- Taken with Pentax K-1, from rebranded HD Pentax-D FA 15-30mm f/2.8 ED SDM WR -->
            <vignetting model="pa" focal="15" aperture="2.8" distance="10" k1="-0.8185" k2="-0.0629" k3="0.1225"/>
            <vignetting model="pa" focal="15" aperture="2.8" distance="1000" k1="-0.8185" k2="-0.0629" k3="0.1225"/>
            <vignetting model="pa" focal="15" aperture="4" distance="10" k1="-1.0067" k2="0.8354" k3="-0.5230"/>
            <vignetting model="pa" focal="15" aperture="4" distance="1000" k1="-1.0067" k2="0.8354" k3="-0.5230"/>
            <vignetting model="pa" focal="15" aperture="5.6" distance="10" k1="-0.9948" k2="0.7210" k3="-0.3207"/>
            <vignetting model="pa" focal="15" aperture="5.6" distance="1000" k1="-0.9948" k2="0.7210" k3="-0.3207"/>
            <vignetting model="pa" focal="15" aperture="8" distance="10" k1="-0.9660" k2="0.5942" k3="-0.1989"/>
            <vignetting model="pa" focal="15" aperture="8" distance="1000" k1="-0.9660" k2="0.5942" k3="-0.1989"/>
            <vignetting model="pa" focal="15" aperture="11" distance="10" k1="-0.9694" k2="0.6024" k3="-0.2026"/>
            <vignetting model="pa" focal="15" aperture="11" distance="1000" k1="-0.9694" k2="0.6024" k3="-0.2026"/>
            <vignetting model="pa" focal="18.1" aperture="2.8" distance="10" k1="-0.7878" k2="-0.1466" k3="0.2421"/>
            <vignetting model="pa" focal="18.1" aperture="2.8" distance="1000" k1="-0.7878" k2="-0.1466" k3="0.2421"/>
            <vignetting model="pa" focal="18.1" aperture="4" distance="10" k1="-0.8753" k2="0.5395" k3="-0.2819"/>
            <vignetting model="pa" focal="18.1" aperture="4" distance="1000" k1="-0.8753" k2="0.5395" k3="-0.2819"/>
            <vignetting model="pa" focal="18.1" aperture="5.6" distance="10" k1="-0.9110" k2="0.6518" k3="-0.2737"/>
            <vignetting model="pa" focal="18.1" aperture="5.6" distance="1000" k1="-0.9110" k2="0.6518" k3="-0.2737"/>
            <vignetting model="pa" focal="18.1" aperture="8" distance="10" k1="-0.8824" k2="0.5745" k3="-0.2141"/>
            <vignetting model="pa" focal="18.1" aperture="8" distance="1000" k1="-0.8824" k2="0.5745" k3="-0.2141"/>
            <vignetting model="pa" focal="18.1" aperture="11" distance="10" k1="-0.8629" k2="0.5330" k3="-0.1840"/>
            <vignetting model="pa" focal="18.1" aperture="11" distance="1000" k1="-0.8629" k2="0.5330" k3="-0.1840"/>
            <vignetting model="pa" focal="20" aperture="2.8" distance="10" k1="-0.7201" k2="-0.2020" k3="0.2723"/>
            <vignetting model="pa" focal="20" aperture="2.8" distance="1000" k1="-0.7201" k2="-0.2020" k3="0.2723"/>
            <vignetting model="pa" focal="20" aperture="4" distance="10" k1="-0.7570" k2="0.2497" k3="-0.0941"/>
            <vignetting model="pa" focal="20" aperture="4" distance="1000" k1="-0.7570" k2="0.2497" k3="-0.0941"/>
            <vignetting model="pa" focal="20" aperture="5.6" distance="10" k1="-0.8678" k2="0.6453" k3="-0.2874"/>
            <vignetting model="pa" focal="20" aperture="5.6" distance="1000" k1="-0.8678" k2="0.6453" k3="-0.2874"/>
            <vignetting model="pa" focal="20" aperture="8" distance="10" k1="-0.8633" k2="0.6230" k3="-0.2634"/>
            <vignetting model="pa" focal="20" aperture="8" distance="1000" k1="-0.8633" k2="0.6230" k3="-0.2634"/>
            <vignetting model="pa" focal="20" aperture="11" distance="10" k1="-0.8724" k2="0.6467" k3="-0.2780"/>
            <vignetting model="pa" focal="20" aperture="11" distance="1000" k1="-0.8724" k2="0.6467" k3="-0.2780"/>
            <vignetting model="pa" focal="24.4" aperture="2.8" distance="10" k1="-0.9452" k2="0.1494" k3="0.1346"/>
            <vignetting model="pa" focal="24.4" aperture="2.8" distance="1000" k1="-0.9452" k2="0.1494" k3="0.1346"/>
            <vignetting model="pa" focal="24.4" aperture="4" distance="10" k1="-0.6402" k2="-0.0731" k3="0.1258"/>
            <vignetting model="pa" focal="24.4" aperture="4" distance="1000" k1="-0.6402" k2="-0.0731" k3="0.1258"/>
            <vignetting model="pa" focal="24.4" aperture="5.6" distance="10" k1="-0.7285" k2="0.5012" k3="-0.2600"/>
            <vignetting model="pa" focal="24.4" aperture="5.6" distance="1000" k1="-0.7285" k2="0.5012" k3="-0.2600"/>
            <vignetting model="pa" focal="24.4" aperture="8" distance="10" k1="-0.7011" k2="0.3935" k3="-0.1482"/>
            <vignetting model="pa" focal="24.4" aperture="8" distance="1000" k1="-0.7011" k2="0.3935" k3="-0.1482"/>
            <vignetting model="pa" focal="24.4" aperture="11" distance="10" k1="-0.6841" k2="0.3640" k3="-0.1287"/>
            <vignetting model="pa" focal="24.4" aperture="11" distance="1000" k1="-0.6841" k2="0.3640" k3="-0.1287"/>
            <vignetting model="pa" focal="30" aperture="2.8" distance="10" k1="-1.3575" k2="1.1946" k3="-0.4851"/>
            <vignetting model="pa" focal="30" aperture="2.8" distance="1000" k1="-1.3575" k2="1.1946" k3="-0.4851"/>
            <vignetting model="pa" focal="30" aperture="4" distance="10" k1="-0.5400" k2="-0.1638" k3="0.1808"/>
            <vignetting model="pa" focal="30" aperture="4" distance="1000" k1="-0.5400" k2="-0.1638" k3="0.1808"/>
            <vignetting model="pa" focal="30" aperture="5.6" distance="10" k1="-0.5789" k2="0.3359" k3="-0.1888"/>
            <vignetting model="pa" focal="30" aperture="5.6" distance="1000" k1="-0.5789" k2="0.3359" k3="-0.1888"/>
            <vignetting model="pa" focal="30" aperture="8" distance="10" k1="-0.5502" k2="0.2220" k3="-0.0707"/>
            <vignetting model="pa" focal="30" aperture="8" distance="1000" k1="-0.5502" k2="0.2220" k3="-0.0707"/>
            <vignetting model="pa" focal="30" aperture="11" distance="10" k1="-0.5707" k2="0.2672" k3="-0.0974"/>
            <vignetting model="pa" focal="30" aperture="11" distance="1000" k1="-0.5707" k2="0.2672" k3="-0.0974"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>HD Pentax-DA 16-85mm f/3.5-5.6 ED DC WR</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.526</cropfactor>
        <calibration>
            <!-- Taken with Pentax K5 -->
            <distortion model="ptlens" focal="16" a="0.0128194" b="-0.0316035" c="-0.0188219"/>
            <distortion model="ptlens" focal="21" a="0.00900492" b="-0.0197809" c="-0.000667816"/>
            <distortion model="ptlens" focal="26" a="0.000946351" b="0.00713425" c="-0.0166867"/>
            <distortion model="ptlens" focal="28" a="-0.0044335" b="0.0251402" c="-0.0279517"/>
            <distortion model="ptlens" focal="35" a="-0.00319378" b="0.0213484" c="-0.0248333"/>
            <distortion model="ptlens" focal="43" a="0.000425028" b="0.00919418" c="-0.0109862"/>
            <distortion model="ptlens" focal="68" a="-0.000323365" b="0.00551294" c="0.00186962"/>
            <distortion model="ptlens" focal="85" a="0.00564139" b="-0.0180164" c="0.0337795"/>
            <tca model="poly3" focal="16" br="-0.0000704" vr="1.0005077" bb="0.0000690" vb="0.9999805"/>
            <tca model="poly3" focal="21" br="-0.0000044" vr="1.0004007" bb="0.0000207" vb="0.9999686"/>
            <tca model="poly3" focal="26" br="0.0000063" vr="1.0003142" bb="0.0000010" vb="0.9999308"/>
            <tca model="poly3" focal="28" br="0.0000026" vr="1.0002490" bb="-0.0000145" vb="0.9999347"/>
            <tca model="poly3" focal="35" br="-0.0000295" vr="1.0002180" bb="-0.0000030" vb="0.9999106"/>
            <tca model="poly3" focal="43" br="-0.0000267" vr="1.0001546" bb="-0.0000031" vb="0.9998828"/>
            <tca model="poly3" focal="48" br="-0.0000256" vr="1.0000562" bb="0.0000067" vb="0.9998701"/>
            <tca model="poly3" focal="68" br="-0.0000360" vr="0.9999061" bb="0.0000238" vb="0.9998529"/>
            <tca model="poly3" focal="85" br="-0.0000305" vr="0.9998040" bb="0.0000295" vb="0.9997888"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-DA 18-55mm f/3.5-5.6 AL</model>
        <!-- FixMe: According to
             <http://en.wikipedia.org/wiki/Pentax_DA_18-55mm_lens>, Samsung
             D-XENON 18-55mm 1:3.5-5.6 AL is an alias. -->
        <mount>Pentax KAF2</mount>
        <focal min="18" max="55"/>
        <aperture min="3.5" max="40"/>
        <!-- Average crop factor of Pentax APS-C cameras -->
        <cropfactor>1.53</cropfactor>
        <calibration>
            <distortion focal="18" model="ptlens" a="0.00606571" b="-0.0251409" c="-0.00216764"/>
            <distortion focal="24" model="ptlens" a="0.00100173" b="-0.0115495" c="0.00286152"/>
            <distortion focal="35" model="ptlens" a="-8.27771e-05" b="0.000563308" c="-0.000657665"/>
            <distortion focal="45" model="ptlens" a="0.00340219" b="-0.0072762" c="0.00763624"/>
            <distortion focal="55" model="ptlens" a="-0.000442312" b="0.00460551" c="-0.00158524"/>
            <tca model="poly3" focal="18" br="-0.0000871" vr="1.0004828" bb="-0.0000263" vb="1.0001433"/>
            <tca model="poly3" focal="20" br="-0.0006746" cr="0.0017899" vr="0.9997634" bb="0.0007446" cb="-0.0011695" vb="1.0005314"/>
            <tca model="poly3" focal="21" br="-0.0012575" cr="0.0022420" vr="1.0000624" bb="-0.0004657" cb="0.0009917" vb="0.9995849"/>
            <tca model="poly3" focal="23" br="0.0008593" cr="-0.0018130" vr="1.0014264" bb="-0.0004830" cb="0.0011743" vb="0.9995325"/>
            <tca model="poly3" focal="24" br="-0.0000122" vr="1.0002181" bb="0.0000383" vb="1.0002671"/>
            <tca model="poly3" focal="26" br="-0.0000261" cr="0.0001475" vr="1.0003238" bb="0.0002433" cb="-0.0002405" vb="1.0002520"/>
            <tca model="poly3" focal="28" br="-0.0000056" cr="-0.0000342" vr="1.0004965" bb="0.0001311" cb="-0.0001193" vb="1.0003247"/>
            <tca model="poly3" focal="31" br="-0.0000110" cr="0.0001737" vr="1.0001522" bb="-0.0004369" cb="0.0009840" vb="0.9997737"/>
            <tca model="poly3" focal="33" br="-0.0004712" cr="0.0008834" vr="0.9998863" bb="-0.0000441" cb="0.0002601" vb="1.0007441"/>
            <tca model="poly3" focal="35" br="-0.0000093" vr="1.0001056" bb="-0.0000299" vb="1.0001859"/>
            <tca model="poly3" focal="38" br="-0.0002914" cr="0.0006529" vr="0.9998320" bb="0.0002885" cb="-0.0004075" vb="1.0007491"/>
            <tca model="poly3" focal="40" br="0.0000435" cr="0.0000393" vr="1.0000392" bb="0.0000098" cb="-0.0001665" vb="1.0002437"/>
            <tca model="poly3" focal="43" br="-0.0000113" vr="1.0001417" bb="0.0000241" vb="1.0000489"/>
            <tca model="poly3" focal="50" br="-0.0001694" cr="0.0004921" vr="0.9997155" bb="0.0000873" cb="-0.0000946" vb="1.0002636"/>
            <tca model="poly3" focal="55" br="-0.0000059" vr="1.0000907" bb="0.0000077" vb="0.9999907"/>
            <!-- Taken with Pentax K20D -->
            <vignetting model="pa" focal="18" aperture="3.5" distance="10" k1="-0.2263" k2="-1.0015" k3="0.6598"/>
            <vignetting model="pa" focal="18" aperture="3.5" distance="1000" k1="-0.2263" k2="-1.0015" k3="0.6598"/>
            <vignetting model="pa" focal="18" aperture="4" distance="10" k1="-0.1131" k2="-1.0728" k3="0.6578"/>
            <vignetting model="pa" focal="18" aperture="4" distance="1000" k1="-0.1131" k2="-1.0728" k3="0.6578"/>
            <vignetting model="pa" focal="18" aperture="5.6" distance="10" k1="-0.0802" k2="-0.4710" k3="0.0853"/>
            <vignetting model="pa" focal="18" aperture="5.6" distance="1000" k1="-0.0802" k2="-0.4710" k3="0.0853"/>
            <vignetting model="pa" focal="18" aperture="8" distance="10" k1="-0.3532" k2="0.5124" k3="-0.5488"/>
            <vignetting model="pa" focal="18" aperture="8" distance="1000" k1="-0.3532" k2="0.5124" k3="-0.5488"/>
            <vignetting model="pa" focal="18" aperture="11" distance="10" k1="-0.3444" k2="0.3737" k3="-0.3126"/>
            <vignetting model="pa" focal="18" aperture="11" distance="1000" k1="-0.3444" k2="0.3737" k3="-0.3126"/>
            <vignetting model="pa" focal="18" aperture="16" distance="10" k1="-0.2724" k2="0.0741" k3="-0.0304"/>
            <vignetting model="pa" focal="18" aperture="16" distance="1000" k1="-0.2724" k2="0.0741" k3="-0.0304"/>
            <vignetting model="pa" focal="18" aperture="22" distance="10" k1="-0.2612" k2="0.0255" k3="0.0105"/>
            <vignetting model="pa" focal="18" aperture="22" distance="1000" k1="-0.2612" k2="0.0255" k3="0.0105"/>
            <vignetting model="pa" focal="24.4" aperture="4" distance="10" k1="-0.2054" k2="-0.9019" k3="0.5965"/>
            <vignetting model="pa" focal="24.4" aperture="4" distance="1000" k1="-0.2054" k2="-0.9019" k3="0.5965"/>
            <vignetting model="pa" focal="24.4" aperture="5.6" distance="10" k1="-0.1241" k2="-0.0710" k3="-0.0923"/>
            <vignetting model="pa" focal="24.4" aperture="5.6" distance="1000" k1="-0.1241" k2="-0.0710" k3="-0.0923"/>
            <vignetting model="pa" focal="24.4" aperture="8" distance="10" k1="-0.2021" k2="0.0920" k3="-0.0522"/>
            <vignetting model="pa" focal="24.4" aperture="8" distance="1000" k1="-0.2021" k2="0.0920" k3="-0.0522"/>
            <vignetting model="pa" focal="24.4" aperture="11" distance="10" k1="-0.1982" k2="0.0453" k3="0.0005"/>
            <vignetting model="pa" focal="24.4" aperture="11" distance="1000" k1="-0.1982" k2="0.0453" k3="0.0005"/>
            <vignetting model="pa" focal="24.4" aperture="16" distance="10" k1="-0.2011" k2="0.0450" k3="0.0029"/>
            <vignetting model="pa" focal="24.4" aperture="16" distance="1000" k1="-0.2011" k2="0.0450" k3="0.0029"/>
            <vignetting model="pa" focal="24.4" aperture="29" distance="10" k1="-0.1973" k2="0.0260" k3="0.0152"/>
            <vignetting model="pa" focal="24.4" aperture="29" distance="1000" k1="-0.1973" k2="0.0260" k3="0.0152"/>
            <vignetting model="pa" focal="35" aperture="4.5" distance="10" k1="-0.7670" k2="0.7438" k3="-0.3915"/>
            <vignetting model="pa" focal="35" aperture="4.5" distance="1000" k1="-0.7670" k2="0.7438" k3="-0.3915"/>
            <vignetting model="pa" focal="35" aperture="5.6" distance="10" k1="-0.0805" k2="-0.4983" k3="0.3216"/>
            <vignetting model="pa" focal="35" aperture="5.6" distance="1000" k1="-0.0805" k2="-0.4983" k3="0.3216"/>
            <vignetting model="pa" focal="35" aperture="8" distance="10" k1="-0.1238" k2="0.0697" k3="-0.0407"/>
            <vignetting model="pa" focal="35" aperture="8" distance="1000" k1="-0.1238" k2="0.0697" k3="-0.0407"/>
            <vignetting model="pa" focal="35" aperture="11" distance="10" k1="-0.1224" k2="0.0371" k3="-0.0021"/>
            <vignetting model="pa" focal="35" aperture="11" distance="1000" k1="-0.1224" k2="0.0371" k3="-0.0021"/>
            <vignetting model="pa" focal="35" aperture="16" distance="10" k1="-0.1327" k2="0.0464" k3="-0.0045"/>
            <vignetting model="pa" focal="35" aperture="16" distance="1000" k1="-0.1327" k2="0.0464" k3="-0.0045"/>
            <vignetting model="pa" focal="35" aperture="32" distance="10" k1="-0.1457" k2="0.0648" k3="-0.0147"/>
            <vignetting model="pa" focal="35" aperture="32" distance="1000" k1="-0.1457" k2="0.0648" k3="-0.0147"/>
            <vignetting model="pa" focal="47.5" aperture="5.6" distance="10" k1="-0.7362" k2="0.6621" k3="-0.2797"/>
            <vignetting model="pa" focal="47.5" aperture="5.6" distance="1000" k1="-0.7362" k2="0.6621" k3="-0.2797"/>
            <vignetting model="pa" focal="47.5" aperture="8" distance="10" k1="0.0203" k2="-0.4593" k3="0.2325"/>
            <vignetting model="pa" focal="47.5" aperture="8" distance="1000" k1="0.0203" k2="-0.4593" k3="0.2325"/>
            <vignetting model="pa" focal="47.5" aperture="11" distance="10" k1="-0.1050" k2="0.0566" k3="-0.0233"/>
            <vignetting model="pa" focal="47.5" aperture="11" distance="1000" k1="-0.1050" k2="0.0566" k3="-0.0233"/>
            <vignetting model="pa" focal="47.5" aperture="16" distance="10" k1="-0.1106" k2="0.0594" k3="-0.0195"/>
            <vignetting model="pa" focal="47.5" aperture="16" distance="1000" k1="-0.1106" k2="0.0594" k3="-0.0195"/>
            <vignetting model="pa" focal="47.5" aperture="22" distance="10" k1="-0.1220" k2="0.0828" k3="-0.0331"/>
            <vignetting model="pa" focal="47.5" aperture="22" distance="1000" k1="-0.1220" k2="0.0828" k3="-0.0331"/>
            <vignetting model="pa" focal="47.5" aperture="40" distance="10" k1="-0.1314" k2="0.1027" k3="-0.0451"/>
            <vignetting model="pa" focal="47.5" aperture="40" distance="1000" k1="-0.1314" k2="0.1027" k3="-0.0451"/>
            <vignetting model="pa" focal="55" aperture="5.6" distance="10" k1="-0.6413" k2="0.4960" k3="-0.1884"/>
            <vignetting model="pa" focal="55" aperture="5.6" distance="1000" k1="-0.6413" k2="0.4960" k3="-0.1884"/>
            <vignetting model="pa" focal="55" aperture="8" distance="10" k1="-0.0357" k2="-0.5717" k3="0.3609"/>
            <vignetting model="pa" focal="55" aperture="8" distance="1000" k1="-0.0357" k2="-0.5717" k3="0.3609"/>
            <vignetting model="pa" focal="55" aperture="11" distance="10" k1="-0.1113" k2="0.1211" k3="-0.0996"/>
            <vignetting model="pa" focal="55" aperture="11" distance="1000" k1="-0.1113" k2="0.1211" k3="-0.0996"/>
            <vignetting model="pa" focal="55" aperture="16" distance="10" k1="-0.1029" k2="0.0627" k3="-0.0232"/>
            <vignetting model="pa" focal="55" aperture="16" distance="1000" k1="-0.1029" k2="0.0627" k3="-0.0232"/>
            <vignetting model="pa" focal="55" aperture="22" distance="10" k1="-0.1142" k2="0.0827" k3="-0.0331"/>
            <vignetting model="pa" focal="55" aperture="22" distance="1000" k1="-0.1142" k2="0.0827" k3="-0.0331"/>
            <vignetting model="pa" focal="55" aperture="40" distance="10" k1="-0.1198" k2="0.0906" k3="-0.0350"/>
            <vignetting model="pa" focal="55" aperture="40" distance="1000" k1="-0.1198" k2="0.0906" k3="-0.0350"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <!-- FixMe: The following is an artificial compound name.  It should be
             refactored in aliases.  The optical equivalence is documented on
             <http://en.wikipedia.org/wiki/Pentax_DA_18-55mm_lens>. -->
        <model>smc Pentax-DA 18-55mm f/3.5-5.6 AL II L WR</model>
        <model lang="en">smc Pentax-DA 18-55mm f/3.5-5.6 AL II/L/WR</model>
        <mount>Pentax KAF2</mount>
        <!-- Average crop factor of Pentax APS-C cameras -->
        <cropfactor>1.53</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="18" a="0.01335" b="-0.04723" c="0.02086"/>
            <distortion model="ptlens" focal="23.1" a="0.00661" b="-0.02435" c="0.01004"/>
            <distortion model="ptlens" focal="28.1" a="0.00284" b="-0.00551" c="-0.0061"/>
            <distortion model="ptlens" focal="37.5" a="-0.00268" b="0.00861" c="-0.00565"/>
            <distortion model="ptlens" focal="42.5" a="0.00025" b="0.00247" c="-0.00182"/>
            <distortion model="ptlens" focal="55" a="0.00071" b="0.00057" c="0.00481"/>
            <tca model="poly3" focal="18" br="-0.0001755" vr="1.0009435" bb="0.0001675" vb="0.9998249"/>
            <tca model="poly3" focal="23.1" br="-0.0000950" vr="1.0006570" bb="0.0001151" vb="0.9999357"/>
            <tca model="poly3" focal="26.2" br="-0.0000496" vr="1.0003769" bb="0.0000072" vb="1.0000781"/>
            <tca model="poly3" focal="28.1" br="-0.0000057" vr="1.0003676" bb="0.0000552" vb="1.0000001"/>
            <tca model="poly3" focal="32.5" br="0.0000248" vr="1.0002094" bb="-0.0000015" vb="1.0000721"/>
            <tca model="poly3" focal="37.5" br="0.0000312" vr="1.0001768" bb="-0.0000128" vb="0.9999995"/>
            <tca model="poly3" focal="42.5" br="0.0000284" vr="1.0001411" bb="-0.0000171" vb="0.9999667"/>
            <tca model="poly3" focal="55" br="-0.0000088" vr="1.0001134" bb="0.0000106" vb="0.9999101"/>
            <vignetting model="pa" focal="18" aperture="3.5" distance="0.25" k1="-0.5281" k2="-0.5422" k3="0.4168"/>
            <vignetting model="pa" focal="18" aperture="3.5" distance="1000" k1="-0.4609" k2="-0.7272" k3="0.5617"/>
            <vignetting model="pa" focal="18" aperture="4.5" distance="10" k1="-0.2056" k2="-0.9233" k3="0.5627"/>
            <vignetting model="pa" focal="18" aperture="4.5" distance="1000" k1="-0.2056" k2="-0.9233" k3="0.5627"/>
            <vignetting model="pa" focal="18" aperture="5" distance="0.25" k1="-0.2576" k2="-0.5723" k3="0.2665"/>
            <vignetting model="pa" focal="18" aperture="5.6" distance="10" k1="-0.2809" k2="-0.2994" k3="0.0404"/>
            <vignetting model="pa" focal="18" aperture="5.6" distance="1000" k1="-0.2809" k2="-0.2994" k3="0.0404"/>
            <vignetting model="pa" focal="18" aperture="7.1" distance="0.25" k1="-0.4691" k2="0.3354" k3="-0.3851"/>
            <vignetting model="pa" focal="18" aperture="8" distance="10" k1="-0.4828" k2="0.4576" k3="-0.4579"/>
            <vignetting model="pa" focal="18" aperture="8" distance="1000" k1="-0.4828" k2="0.4576" k3="-0.4579"/>
            <vignetting model="pa" focal="18" aperture="10" distance="0.25" k1="-0.5710" k2="0.6335" k3="-0.5060"/>
            <vignetting model="pa" focal="18" aperture="22" distance="0.25" k1="-0.4740" k2="0.1812" k3="-0.0413"/>
            <vignetting model="pa" focal="18" aperture="22" distance="1000" k1="-0.4238" k2="0.0931" k3="0.0117"/>
            <vignetting model="pa" focal="24.4" aperture="4" distance="0.25" k1="-0.3716" k2="-0.7308" k3="0.5379"/>
            <vignetting model="pa" focal="24.4" aperture="4" distance="1000" k1="-0.3282" k2="-0.8336" k3="0.6009"/>
            <vignetting model="pa" focal="24.4" aperture="5.6" distance="0.25" k1="-0.3151" k2="0.1493" k3="-0.1858"/>
            <vignetting model="pa" focal="24.4" aperture="5.6" distance="1000" k1="-0.2824" k2="0.0834" k3="-0.1526"/>
            <vignetting model="pa" focal="24.4" aperture="7.1" distance="10" k1="-0.3295" k2="0.2088" k3="-0.1640"/>
            <vignetting model="pa" focal="24.4" aperture="7.1" distance="1000" k1="-0.3295" k2="0.2088" k3="-0.1640"/>
            <vignetting model="pa" focal="24.4" aperture="8" distance="0.25" k1="-0.3386" k2="0.1627" k3="-0.0775"/>
            <vignetting model="pa" focal="24.4" aperture="9" distance="10" k1="-0.2816" k2="0.0108" k3="0.0353"/>
            <vignetting model="pa" focal="24.4" aperture="9" distance="1000" k1="-0.2816" k2="0.0108" k3="0.0353"/>
            <vignetting model="pa" focal="24.4" aperture="11" distance="0.25" k1="-0.3184" k2="0.0826" k3="-0.0034"/>
            <vignetting model="pa" focal="24.4" aperture="13" distance="10" k1="-0.2776" k2="-0.0099" k3="0.0554"/>
            <vignetting model="pa" focal="24.4" aperture="13" distance="1000" k1="-0.2776" k2="-0.0099" k3="0.0554"/>
            <vignetting model="pa" focal="24.4" aperture="22" distance="10" k1="-0.2868" k2="0.0077" k3="0.0452"/>
            <vignetting model="pa" focal="24.4" aperture="22" distance="1000" k1="-0.2868" k2="0.0077" k3="0.0452"/>
            <vignetting model="pa" focal="24.4" aperture="29" distance="0.25" k1="-0.3367" k2="0.1198" k3="-0.0267"/>
            <vignetting model="pa" focal="24.4" aperture="29" distance="1000" k1="-0.2755" k2="0.0089" k3="0.0409"/>
            <vignetting model="pa" focal="35" aperture="4.5" distance="0.25" k1="-0.8683" k2="0.8449" k3="-0.4290"/>
            <vignetting model="pa" focal="35" aperture="4.5" distance="1000" k1="-0.8083" k2="0.7058" k3="-0.3560"/>
            <vignetting model="pa" focal="35" aperture="6.3" distance="0.25" k1="-0.1840" k2="0.0280" k3="-0.0638"/>
            <vignetting model="pa" focal="35" aperture="6.3" distance="1000" k1="-0.1620" k2="-0.0033" k3="-0.0406"/>
            <vignetting model="pa" focal="35" aperture="8" distance="10" k1="-0.1710" k2="-0.0044" k3="0.0292"/>
            <vignetting model="pa" focal="35" aperture="8" distance="1000" k1="-0.1710" k2="-0.0044" k3="0.0292"/>
            <vignetting model="pa" focal="35" aperture="9" distance="0.25" k1="-0.2228" k2="0.1188" k3="-0.0436"/>
            <vignetting model="pa" focal="35" aperture="10" distance="10" k1="-0.1678" k2="-0.0095" k3="0.0323"/>
            <vignetting model="pa" focal="35" aperture="10" distance="1000" k1="-0.1678" k2="-0.0095" k3="0.0323"/>
            <vignetting model="pa" focal="35" aperture="13" distance="0.25" k1="-0.2337" k2="0.1526" k3="-0.0683"/>
            <vignetting model="pa" focal="35" aperture="32" distance="0.25" k1="-0.2843" k2="0.2684" k3="-0.1417"/>
            <vignetting model="pa" focal="35" aperture="32" distance="1000" k1="-0.2018" k2="0.0702" k3="-0.0174"/>
            <vignetting model="pa" focal="47.5" aperture="5.6" distance="0.25" k1="-0.7973" k2="0.6968" k3="-0.2860"/>
            <vignetting model="pa" focal="47.5" aperture="8" distance="0.25" k1="-0.1196" k2="-0.0810" k3="-0.0139"/>
            <vignetting model="pa" focal="47.5" aperture="9" distance="0.25" k1="-0.1910" k2="0.1532" k3="-0.1149"/>
            <vignetting model="pa" focal="47.5" aperture="11" distance="0.25" k1="-0.1745" k2="0.0635" k3="-0.0075"/>
            <vignetting model="pa" focal="47.5" aperture="16" distance="0.25" k1="-0.1837" k2="0.0723" k3="-0.0059"/>
            <vignetting model="pa" focal="47.5" aperture="32" distance="10" k1="-0.1783" k2="0.1006" k3="-0.0421"/>
            <vignetting model="pa" focal="47.5" aperture="32" distance="1000" k1="-0.1783" k2="0.1006" k3="-0.0421"/>
            <vignetting model="pa" focal="47.5" aperture="40" distance="0.25" k1="-0.2496" k2="0.2218" k3="-0.0956"/>
            <vignetting model="pa" focal="47.5" aperture="40" distance="1000" k1="-0.1828" k2="0.1129" k3="-0.0506"/>
            <vignetting model="pa" focal="55" aperture="5.6" distance="0.25" k1="-0.6843" k2="0.4937" k3="-0.1732"/>
            <vignetting model="pa" focal="55" aperture="5.6" distance="1000" k1="-0.6731" k2="0.4889" k3="-0.1775"/>
            <vignetting model="pa" focal="55" aperture="8" distance="0.25" k1="-0.0285" k2="-0.5030" k3="0.2810"/>
            <vignetting model="pa" focal="55" aperture="8" distance="1000" k1="-0.0107" k2="-0.4980" k3="0.2650"/>
            <vignetting model="pa" focal="55" aperture="10" distance="0.25" k1="-0.1616" k2="0.1161" k3="-0.1142"/>
            <vignetting model="pa" focal="55" aperture="11" distance="10" k1="-0.1306" k2="0.0466" k3="-0.0324"/>
            <vignetting model="pa" focal="55" aperture="11" distance="1000" k1="-0.1306" k2="0.0466" k3="-0.0324"/>
            <vignetting model="pa" focal="55" aperture="13" distance="0.25" k1="-0.1488" k2="0.0273" k3="0.0133"/>
            <vignetting model="pa" focal="55" aperture="16" distance="0.25" k1="-0.1449" k2="0.0118" k3="0.0245"/>
            <vignetting model="pa" focal="55" aperture="16" distance="1000" k1="-0.1099" k2="-0.0250" k3="0.0301"/>
            <vignetting model="pa" focal="55" aperture="40" distance="0.25" k1="-0.2083" k2="0.1109" k3="-0.0162"/>
            <vignetting model="pa" focal="55" aperture="40" distance="1000" k1="-0.1585" k2="0.0524" k3="0.0008"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-DA 18-135mm f/3.5-5.6 ED AL IF DC WR</model>
        <mount>Pentax K</mount>
        <!-- Average crop factor of Pentax APS-C cameras -->
        <cropfactor>1.53</cropfactor>
        <calibration>
            <!-- Distortion only: taken with Pentax K-30 -->
            <!-- c param manually adjusted for better correction -->
            <distortion model="ptlens" focal="18" a="0.02393" b="-0.05763" c="0.00100"/>
            <distortion model="ptlens" focal="21" a="0.01763" b="-0.05222" c="0.03794"/>
            <distortion model="ptlens" focal="28" a="0.01089" b="-0.02102" c="0.01433"/>
            <distortion model="ptlens" focal="36" a="-0.00227" b="0.02123" c="-0.01979"/>
            <distortion model="ptlens" focal="60" a="0.00341" b="0.00207" c="-0.0044"/>
            <distortion model="ptlens" focal="115" a="0.00593" b="-0.02413" c="0.04608"/>
            <distortion model="ptlens" focal="135" a="-0.00175" b="0.0149" c="-0.01197"/>
            <tca model="poly3" focal="18" br="0.0001" vr="1.00017" bb="0.00005" vb="1.00048"/>
            <tca model="poly3" focal="24" br="0.000" vr="1.00013" bb="0.0001" vb="1.000223"/>
            <tca model="poly3" focal="36" br="-0.000019" vr="1.00003" bb="-0.00005" vb="1.00023"/>
            <tca model="poly3" focal="53" br="0.0000" vr="0.9999" bb="-0.00005" vb="1.0001"/>
            <tca model="poly3" focal="68" br="0.000" vr="0.9998" bb="-0.00005" vb="1.0000"/>
            <tca model="poly3" focal="100" br="-0.00015" vr="0.99955" bb="-0.00005" vb="0.99996"/>
            <tca model="poly3" focal="135" br="-0.0004" vr="0.9994" bb="-0.00007" vb="0.99991"/>
            <vignetting model="pa" focal="18" aperture="11" distance="1000" k1="-0.0932" k2="0.02721" k3="-0.0432"/>
            <vignetting model="pa" focal="24" aperture="11" distance="1000" k1="-0.12861" k2="0.09689" k3="-0.05551"/>
            <vignetting model="pa" focal="36" aperture="11" distance="1000" k1="-0.14874" k2="0.19321" k3="-0.12757"/>
            <vignetting model="pa" focal="53" aperture="11" distance="1000" k1="-0.05186" k2="-0.06742" k3="0.05663"/>
            <vignetting model="pa" focal="68" aperture="11" distance="1000" k1="-0.11324" k2="0.21297" k3="-0.19382"/>
            <vignetting model="pa" focal="100" aperture="11" distance="1000" k1="-0.10339" k2="0.24899" k3="-0.28571"/>
            <vignetting model="pa" focal="135" aperture="11" distance="1000" k1="-0.16882" k2="0.35516" k3="-0.28791"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-DA 18-250mm f/3.5-6.3 ED AL [IF]</model>
        <!-- This lens is a clone of the Tamron 18-250 with identical specs -->
        <mount>Pentax KAF2</mount>
        <!-- Average crop factor of Pentax APS-C cameras -->
        <cropfactor>1.53</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="18" a="0.020360" b="-0.059050" c="0"/>
            <distortion model="ptlens" focal="20" a="0.020770" b="-0.052400" c="0"/>
            <distortion model="ptlens" focal="23" a="0.016230" b="-0.032540" c="0"/>
            <distortion model="ptlens" focal="29" a="0.012160" b="-0.015480" c="0"/>
            <distortion model="ptlens" focal="35" a="0" b="0.037550" c="-0"/>
            <distortion model="ptlens" focal="47" a="0" b="0.033220" c="-0"/>
            <distortion model="ptlens" focal="70" a="0" b="0.017510" c="-0.014350"/>
            <distortion model="ptlens" focal="100" a="0" b="0.018700" c="-0.018810"/>
            <distortion model="ptlens" focal="120" a="0" b="0.018400" c="-0.019970"/>
            <distortion model="ptlens" focal="155" a="0" b="0.009580" c="-0.002450"/>
            <distortion model="ptlens" focal="200" a="0" b="0.001230" c="0.013960"/>
            <distortion model="ptlens" focal="250" a="0" b="-0.000110" c="0.008560"/>
            <tca model="poly3" focal="18" br="0.0000455" cr="0.0001324" vr="1.0003247" bb="-0.0002737" cb="0.0006098" vb="1.0000266"/>
            <tca model="poly3" focal="23.1" br="-0.0000830" cr="0.0002635" vr="1.0002333" bb="-0.0001797" cb="0.0007033" vb="0.9999820"/>
            <tca model="poly3" focal="26.9" br="-0.0003871" cr="0.0008622" vr="0.9999533" bb="-0.0001398" cb="0.0006987" vb="0.9999226"/>
            <tca model="poly3" focal="29.4" br="-0.0003218" cr="0.0007089" vr="0.9999775" bb="0.0001630" cb="-0.0000255" vb="1.0003434"/>
            <tca model="poly3" focal="35" br="-0.0001337" cr="0.0002671" vr="1.0000620" bb="-0.0000737" cb="0.0004179" vb="1.0001761"/>
            <tca model="poly3" focal="55" br="-0.0000006" cr="-0.0000747" vr="1.0000795" bb="-0.0000202" cb="0.0002275" vb="1.0002342"/>
            <tca model="poly3" focal="70" br="-0.0000020" cr="-0.0000449" vr="0.9999473" bb="-0.0002686" cb="0.0006367" vb="1.0000025"/>
            <tca model="poly3" focal="100" br="0.0000928" cr="-0.0002755" vr="0.9998440" bb="-0.0001632" cb="0.0002535" vb="1.0000525"/>
            <tca model="poly3" focal="142.5" br="0.0001761" cr="-0.0004582" vr="0.9996290" bb="-0.0003233" cb="0.0005660" vb="0.9996693"/>
            <tca model="poly3" focal="220" br="0.0001387" cr="-0.0004467" vr="0.9993390" bb="0.0000952" cb="-0.0001185" vb="0.9997363"/>
            <tca model="poly3" focal="250" br="0.0005417" cr="-0.0013082" vr="0.9997014" bb="-0.0007442" cb="0.0015463" vb="0.9988026"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>Pentax-F 28-80mm f/3.5-4.5</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.526</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-5 -->
            <distortion model="ptlens" focal="28" a="0.00103457" b="-0.0104385" c="-0.00251646"/>
            <distortion model="ptlens" focal="36" a="-0.00951146" b="0.0384678" c="-0.0644029"/>
            <distortion model="ptlens" focal="50" a="0.000214314" b="0.00652746" c="-0.0189032"/>
            <distortion model="ptlens" focal="68" a="-0.00808015" b="0.0359238" c="-0.052148"/>
            <distortion model="ptlens" focal="80" a="-0.0033906" b="0.0165939" c="-0.0253379"/>
            <tca model="poly3" focal="28" br="0.0000000" vr="1.0003470" bb="0.0000514" vb="1.0000402"/>
            <tca model="poly3" focal="36" br="0.0000153" vr="1.0002037" bb="0.0000424" vb="1.0000780"/>
            <tca model="poly3" focal="50" br="-0.0000103" vr="1.0001007" bb="0.0000085" vb="1.0001358"/>
            <tca model="poly3" focal="68" br="-0.0000330" vr="1.0001177" bb="-0.0000271" vb="1.0001116"/>
            <tca model="poly3" focal="80" br="-0.0000109" vr="1.0000879" bb="-0.0000033" vb="1.0000849"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>HD Pentax-D FA 28-105mm f/3.5-5.6 ED DC WR</model>
        <mount>Pentax KAF3</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-1 -->
            <distortion model="ptlens" focal="28" a="0.0165845" b="-0.0455463" c="-0.000358805"/>
            <distortion model="ptlens" focal="40" a="0.00653256" b="-0.00768683" c="-0.00543098"/>
            <distortion model="ptlens" focal="58" a="0" b="0.00741997" c="0"/>
            <distortion model="ptlens" focal="73" a="0" b="0.00819869" c="0"/>
            <distortion model="ptlens" focal="105" a="0" b="0.00850785" c="0"/>
            <tca model="poly3" focal="28" vr="1.0002510" vb="1.0001311"/>
            <tca model="poly3" focal="40" vr="1.0001204" vb="1.0000619"/>
            <tca model="poly3" focal="58" vr="1.0000364" vb="0.9999813"/>
            <tca model="poly3" focal="73" vr="0.9999050" vb="0.9999360"/>
            <tca model="poly3" focal="105" vr="0.9995892" vb="0.9999858"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>HD Pentax-D FA* 70-200mm f/2.8 ED DC AW</model>
        <mount>Pentax KAF3</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-1 -->
            <distortion model="poly3" focal="70" k1="-0.00933819"/>
            <distortion model="poly3" focal="108" k1="-0.000743662"/>
            <distortion model="poly3" focal="140" k1="0.00393503"/>
            <distortion model="poly3" focal="200" k1="0.00628692"/>
            <tca model="poly3" focal="70" vr="1.0002338" vb="1.0000437"/>
            <tca model="poly3" focal="108" vr="1.0000771" vb="1.0001445"/>
            <tca model="poly3" focal="140" vr="0.9999756" vb="1.0001374"/>
            <tca model="poly3" focal="200" vr="0.9999045" vb="1.0000246"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-DA 50-200mm f/4-5.6 DA ED</model>
        <mount>Pentax KAF2</mount>
        <!-- Average crop factor of Pentax APS-C cameras -->
        <cropfactor>1.53</cropfactor>
        <calibration>
            <distortion model="poly3" focal="50" k1="-0.004038"/>
            <distortion model="poly3" focal="63" k1="0.001607"/>
            <distortion model="poly3" focal="95" k1="0.007697"/>
            <distortion model="poly3" focal="125" k1="0.007991"/>
            <distortion model="poly3" focal="138" k1="0.008036"/>
            <distortion model="poly3" focal="160" k1="0.007909"/>
            <distortion model="poly3" focal="180" k1="0.009293"/>
            <distortion model="poly3" focal="200" k1="0.007685"/>
            <!-- Vignetting pictures taken with Pentax K20D -->
            <vignetting model="pa" focal="50" aperture="4" distance="10" k1="-0.3248" k2="-0.4362" k3="0.2366"/>
            <vignetting model="pa" focal="50" aperture="4" distance="1000" k1="-0.3248" k2="-0.4362" k3="0.2366"/>
            <vignetting model="pa" focal="50" aperture="5.6" distance="10" k1="-0.0309" k2="-0.5537" k3="0.1946"/>
            <vignetting model="pa" focal="50" aperture="5.6" distance="1000" k1="-0.0309" k2="-0.5537" k3="0.1946"/>
            <vignetting model="pa" focal="50" aperture="8" distance="10" k1="-0.1649" k2="0.1234" k3="-0.0901"/>
            <vignetting model="pa" focal="50" aperture="8" distance="1000" k1="-0.1649" k2="0.1234" k3="-0.0901"/>
            <vignetting model="pa" focal="50" aperture="11" distance="10" k1="-0.1447" k2="0.0450" k3="-0.0100"/>
            <vignetting model="pa" focal="50" aperture="11" distance="1000" k1="-0.1447" k2="0.0450" k3="-0.0100"/>
            <vignetting model="pa" focal="50" aperture="16" distance="10" k1="-0.1432" k2="0.0458" k3="-0.0110"/>
            <vignetting model="pa" focal="50" aperture="16" distance="1000" k1="-0.1432" k2="0.0458" k3="-0.0110"/>
            <vignetting model="pa" focal="50" aperture="22" distance="10" k1="-0.1475" k2="0.0581" k3="-0.0199"/>
            <vignetting model="pa" focal="50" aperture="22" distance="1000" k1="-0.1475" k2="0.0581" k3="-0.0199"/>
            <vignetting model="pa" focal="80" aperture="4.5" distance="10" k1="-0.3824" k2="-0.0328" k3="0.0285"/>
            <vignetting model="pa" focal="80" aperture="4.5" distance="1000" k1="-0.3824" k2="-0.0328" k3="0.0285"/>
            <vignetting model="pa" focal="80" aperture="5.6" distance="10" k1="-0.2982" k2="-0.1506" k3="0.0941"/>
            <vignetting model="pa" focal="80" aperture="5.6" distance="1000" k1="-0.2982" k2="-0.1506" k3="0.0941"/>
            <vignetting model="pa" focal="80" aperture="8" distance="10" k1="-0.1328" k2="0.1286" k3="-0.1262"/>
            <vignetting model="pa" focal="80" aperture="8" distance="1000" k1="-0.1328" k2="0.1286" k3="-0.1262"/>
            <vignetting model="pa" focal="80" aperture="11" distance="10" k1="-0.1183" k2="0.0474" k3="-0.0136"/>
            <vignetting model="pa" focal="80" aperture="11" distance="1000" k1="-0.1183" k2="0.0474" k3="-0.0136"/>
            <vignetting model="pa" focal="80" aperture="16" distance="10" k1="-0.1181" k2="0.0538" k3="-0.0187"/>
            <vignetting model="pa" focal="80" aperture="16" distance="1000" k1="-0.1181" k2="0.0538" k3="-0.0187"/>
            <vignetting model="pa" focal="80" aperture="29" distance="10" k1="-0.1252" k2="0.0746" k3="-0.0325"/>
            <vignetting model="pa" focal="80" aperture="29" distance="1000" k1="-0.1252" k2="0.0746" k3="-0.0325"/>
            <vignetting model="pa" focal="95" aperture="4.5" distance="10" k1="-0.3324" k2="-0.0859" k3="-0.0037"/>
            <vignetting model="pa" focal="95" aperture="4.5" distance="1000" k1="-0.3324" k2="-0.0859" k3="-0.0037"/>
            <vignetting model="pa" focal="95" aperture="5.6" distance="10" k1="-0.3247" k2="-0.0748" k3="-0.0124"/>
            <vignetting model="pa" focal="95" aperture="5.6" distance="1000" k1="-0.3247" k2="-0.0748" k3="-0.0124"/>
            <vignetting model="pa" focal="95" aperture="8" distance="10" k1="-0.1183" k2="0.0992" k3="-0.0802"/>
            <vignetting model="pa" focal="95" aperture="8" distance="1000" k1="-0.1183" k2="0.0992" k3="-0.0802"/>
            <vignetting model="pa" focal="95" aperture="11" distance="10" k1="-0.1099" k2="0.0501" k3="-0.0152"/>
            <vignetting model="pa" focal="95" aperture="11" distance="1000" k1="-0.1099" k2="0.0501" k3="-0.0152"/>
            <vignetting model="pa" focal="95" aperture="16" distance="10" k1="-0.1123" k2="0.0613" k3="-0.0225"/>
            <vignetting model="pa" focal="95" aperture="16" distance="1000" k1="-0.1123" k2="0.0613" k3="-0.0225"/>
            <vignetting model="pa" focal="95" aperture="29" distance="10" k1="-0.1108" k2="0.0588" k3="-0.0192"/>
            <vignetting model="pa" focal="95" aperture="29" distance="1000" k1="-0.1108" k2="0.0588" k3="-0.0192"/>
            <vignetting model="pa" focal="138" aperture="4.5" distance="10" k1="-0.2629" k2="-0.6520" k3="0.4563"/>
            <vignetting model="pa" focal="138" aperture="4.5" distance="1000" k1="-0.2629" k2="-0.6520" k3="0.4563"/>
            <vignetting model="pa" focal="138" aperture="5.6" distance="10" k1="-0.2687" k2="-0.6321" k3="0.4415"/>
            <vignetting model="pa" focal="138" aperture="5.6" distance="1000" k1="-0.2687" k2="-0.6321" k3="0.4415"/>
            <vignetting model="pa" focal="138" aperture="8" distance="10" k1="-0.1056" k2="0.1631" k3="-0.2354"/>
            <vignetting model="pa" focal="138" aperture="8" distance="1000" k1="-0.1056" k2="0.1631" k3="-0.2354"/>
            <vignetting model="pa" focal="138" aperture="11" distance="10" k1="-0.0966" k2="0.0415" k3="-0.0081"/>
            <vignetting model="pa" focal="138" aperture="11" distance="1000" k1="-0.0966" k2="0.0415" k3="-0.0081"/>
            <vignetting model="pa" focal="138" aperture="16" distance="10" k1="-0.1000" k2="0.0559" k3="-0.0186"/>
            <vignetting model="pa" focal="138" aperture="16" distance="1000" k1="-0.1000" k2="0.0559" k3="-0.0186"/>
            <vignetting model="pa" focal="138" aperture="29" distance="10" k1="-0.1014" k2="0.0582" k3="-0.0171"/>
            <vignetting model="pa" focal="138" aperture="29" distance="1000" k1="-0.1014" k2="0.0582" k3="-0.0171"/>
            <vignetting model="pa" focal="200" aperture="5.6" distance="10" k1="-0.9874" k2="0.8298" k3="-0.3319"/>
            <vignetting model="pa" focal="200" aperture="5.6" distance="1000" k1="-0.9874" k2="0.8298" k3="-0.3319"/>
            <vignetting model="pa" focal="200" aperture="8" distance="10" k1="0.0101" k2="-0.2621" k3="0.0531"/>
            <vignetting model="pa" focal="200" aperture="8" distance="1000" k1="0.0101" k2="-0.2621" k3="0.0531"/>
            <vignetting model="pa" focal="200" aperture="11" distance="10" k1="-0.0830" k2="0.0376" k3="-0.0069"/>
            <vignetting model="pa" focal="200" aperture="11" distance="1000" k1="-0.0830" k2="0.0376" k3="-0.0069"/>
            <vignetting model="pa" focal="200" aperture="16" distance="10" k1="-0.0857" k2="0.0459" k3="-0.0106"/>
            <vignetting model="pa" focal="200" aperture="16" distance="1000" k1="-0.0857" k2="0.0459" k3="-0.0106"/>
            <vignetting model="pa" focal="200" aperture="32" distance="10" k1="-0.0787" k2="0.0275" k3="0.0014"/>
            <vignetting model="pa" focal="200" aperture="32" distance="1000" k1="-0.0787" k2="0.0275" k3="0.0014"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>HD Pentax-DA 55-300mm f/4-5.8 ED WR</model>
        <mount>Pentax KAF3</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-1 -->
            <distortion model="ptlens" focal="55" a="0.00917" b="-0.03664" c="0.02573"/>
            <distortion model="ptlens" focal="77.5" a="0" b="0.01961" c="0"/>
            <distortion model="ptlens" focal="107.5" a="0" b="0.02241" c="0"/>
            <distortion model="ptlens" focal="150" a="0" b="0.02426" c="0"/>
            <distortion model="ptlens" focal="300" a="0" b="0.01784" c="0"/>
            <tca model="poly3" focal="55" vr="1.0002190" vb="0.9999780"/>
            <tca model="poly3" focal="77.5" vr="1.0000514" vb="0.9999319"/>
            <tca model="poly3" focal="107.5" vr="0.9999875" vb="0.9999069"/>
            <tca model="poly3" focal="150" vr="0.9999301" vb="0.9996422"/>
            <tca model="poly3" focal="300" vr="0.9997730" vb="0.9992534"/>
        </calibration>
    </lens>
    <lens>
        <!-- This is a copy of the smc Pentax-DA L 55-300mm f/4-5.8 ED below.
             Please keep in sync. -->
        <maker>Pentax</maker>
        <model>smc Pentax-DA 55-300mm f/4-5.8 ED</model>
        <mount>Pentax KAF2</mount>
        <!-- Average crop factor of Pentax APS-C cameras -->
        <cropfactor>1.53</cropfactor>
        <calibration>
            <!-- Taken with K-01 -->
            <distortion model="ptlens" focal="55" a="-0.00868" b="0.02017" c="-0.0181"/>
            <distortion model="ptlens" focal="70" a="-0.00225" b="0.01408" c="-0.01582"/>
            <distortion model="ptlens" focal="97.5" a="0.00246" b="0.00213" c="0.00418"/>
            <distortion model="ptlens" focal="107.5" a="-0.00444" b="0.02225" c="-0.00978"/>
            <distortion model="ptlens" focal="190" a="0.01292" b="-0.03145" c="0.03701"/>
            <distortion model="ptlens" focal="210" a="-0.0056" b="0.02291" c="-0.0044"/>
            <distortion model="ptlens" focal="300" a="-0.00162" b="0.01133" c="-0.00288"/>
            <tca model="poly3" focal="55" br="0.0000520" vr="0.9999962" bb="-0.0000776" vb="1.0002963"/>
            <tca model="poly3" focal="70" br="0.0000448" vr="0.9999714" bb="-0.0000700" vb="1.0001800"/>
            <tca model="poly3" focal="70" br="0.0000469" vr="0.9999716" bb="-0.0000747" vb="1.0001989"/>
            <tca model="poly3" focal="97.5" br="0.0000329" vr="0.9998981" bb="-0.0000718" vb="1.0000620"/>
            <tca model="poly3" focal="107.5" br="0.0000306" vr="0.9998847" bb="-0.0000745" vb="1.0000587"/>
            <tca model="poly3" focal="190" br="-0.0000425" vr="0.9997575" bb="-0.0000713" vb="0.9998580"/>
            <tca model="poly3" focal="210" br="-0.0000439" vr="0.9997405" bb="-0.0000684" vb="0.9998079"/>
            <tca model="poly3" focal="300" br="-0.0000511" vr="0.9997125" bb="-0.0000240" vb="0.9995270"/>
            <vignetting model="pa" focal="55" aperture="4" distance="10" k1="-0.4367" k2="-0.0079" k3="0.0951"/>
            <vignetting model="pa" focal="55" aperture="4" distance="1000" k1="-0.4367" k2="-0.0079" k3="0.0951"/>
            <vignetting model="pa" focal="55" aperture="5.6" distance="10" k1="-0.1654" k2="0.0298" k3="-0.0544"/>
            <vignetting model="pa" focal="55" aperture="5.6" distance="1000" k1="-0.1654" k2="0.0298" k3="-0.0544"/>
            <vignetting model="pa" focal="55" aperture="8" distance="10" k1="-0.1933" k2="0.0906" k3="-0.0561"/>
            <vignetting model="pa" focal="55" aperture="8" distance="1000" k1="-0.1933" k2="0.0906" k3="-0.0561"/>
            <vignetting model="pa" focal="55" aperture="11" distance="10" k1="-0.2047" k2="0.0685" k3="-0.0145"/>
            <vignetting model="pa" focal="55" aperture="11" distance="1000" k1="-0.2047" k2="0.0685" k3="-0.0145"/>
            <vignetting model="pa" focal="55" aperture="16" distance="10" k1="-0.1948" k2="0.1000" k3="-0.0644"/>
            <vignetting model="pa" focal="55" aperture="16" distance="1000" k1="-0.1948" k2="0.1000" k3="-0.0644"/>
            <vignetting model="pa" focal="55" aperture="22" distance="10" k1="-0.1742" k2="0.0479" k3="-0.0305"/>
            <vignetting model="pa" focal="55" aperture="22" distance="1000" k1="-0.1742" k2="0.0479" k3="-0.0305"/>
            <vignetting model="pa" focal="70" aperture="4" distance="10" k1="-0.4294" k2="-0.0506" k3="0.1512"/>
            <vignetting model="pa" focal="70" aperture="4" distance="1000" k1="-0.4294" k2="-0.0506" k3="0.1512"/>
            <vignetting model="pa" focal="70" aperture="5.6" distance="10" k1="-0.2161" k2="0.1426" k3="-0.1047"/>
            <vignetting model="pa" focal="70" aperture="5.6" distance="1000" k1="-0.2161" k2="0.1426" k3="-0.1047"/>
            <vignetting model="pa" focal="70" aperture="8" distance="10" k1="-0.2017" k2="0.0724" k3="-0.0120"/>
            <vignetting model="pa" focal="70" aperture="8" distance="1000" k1="-0.2017" k2="0.0724" k3="-0.0120"/>
            <vignetting model="pa" focal="70" aperture="11" distance="10" k1="-0.2194" k2="0.1149" k3="-0.0378"/>
            <vignetting model="pa" focal="70" aperture="11" distance="1000" k1="-0.2194" k2="0.1149" k3="-0.0378"/>
            <vignetting model="pa" focal="70" aperture="16" distance="10" k1="-0.1946" k2="0.0791" k3="-0.0240"/>
            <vignetting model="pa" focal="70" aperture="16" distance="1000" k1="-0.1946" k2="0.0791" k3="-0.0240"/>
            <vignetting model="pa" focal="70" aperture="22" distance="10" k1="-0.2081" k2="0.0946" k3="-0.0259"/>
            <vignetting model="pa" focal="70" aperture="22" distance="1000" k1="-0.2081" k2="0.0946" k3="-0.0259"/>
            <vignetting model="pa" focal="97.5" aperture="4" distance="10" k1="-0.4583" k2="0.1879" k3="-0.1581"/>
            <vignetting model="pa" focal="97.5" aperture="4" distance="1000" k1="-0.4583" k2="0.1879" k3="-0.1581"/>
            <vignetting model="pa" focal="97.5" aperture="5.6" distance="10" k1="-0.1985" k2="0.1246" k3="-0.0973"/>
            <vignetting model="pa" focal="97.5" aperture="5.6" distance="1000" k1="-0.1985" k2="0.1246" k3="-0.0973"/>
            <vignetting model="pa" focal="97.5" aperture="8" distance="10" k1="-0.1829" k2="0.0446" k3="0.0029"/>
            <vignetting model="pa" focal="97.5" aperture="8" distance="1000" k1="-0.1829" k2="0.0446" k3="0.0029"/>
            <vignetting model="pa" focal="97.5" aperture="11" distance="10" k1="-0.1932" k2="0.0702" k3="-0.0109"/>
            <vignetting model="pa" focal="97.5" aperture="11" distance="1000" k1="-0.1932" k2="0.0702" k3="-0.0109"/>
            <vignetting model="pa" focal="97.5" aperture="16" distance="10" k1="-0.1782" k2="0.0372" k3="0.0069"/>
            <vignetting model="pa" focal="97.5" aperture="16" distance="1000" k1="-0.1782" k2="0.0372" k3="0.0069"/>
            <vignetting model="pa" focal="97.5" aperture="22" distance="10" k1="-0.1656" k2="0.0113" k3="0.0131"/>
            <vignetting model="pa" focal="97.5" aperture="22" distance="1000" k1="-0.1656" k2="0.0113" k3="0.0131"/>
            <vignetting model="pa" focal="190" aperture="4.5" distance="10" k1="-0.3897" k2="-0.2654" k3="0.2262"/>
            <vignetting model="pa" focal="190" aperture="4.5" distance="1000" k1="-0.3897" k2="-0.2654" k3="0.2262"/>
            <vignetting model="pa" focal="190" aperture="5.6" distance="10" k1="-0.0663" k2="-0.5508" k3="0.2879"/>
            <vignetting model="pa" focal="190" aperture="5.6" distance="1000" k1="-0.0663" k2="-0.5508" k3="0.2879"/>
            <vignetting model="pa" focal="190" aperture="8" distance="10" k1="-0.1508" k2="0.0623" k3="-0.0219"/>
            <vignetting model="pa" focal="190" aperture="8" distance="1000" k1="-0.1508" k2="0.0623" k3="-0.0219"/>
            <vignetting model="pa" focal="190" aperture="11" distance="10" k1="-0.1449" k2="0.0423" k3="-0.0043"/>
            <vignetting model="pa" focal="190" aperture="11" distance="1000" k1="-0.1449" k2="0.0423" k3="-0.0043"/>
            <vignetting model="pa" focal="190" aperture="16" distance="10" k1="-0.1626" k2="0.0727" k3="-0.0192"/>
            <vignetting model="pa" focal="190" aperture="16" distance="1000" k1="-0.1626" k2="0.0727" k3="-0.0192"/>
            <vignetting model="pa" focal="190" aperture="22" distance="10" k1="-0.1587" k2="0.0672" k3="-0.0170"/>
            <vignetting model="pa" focal="190" aperture="22" distance="1000" k1="-0.1587" k2="0.0672" k3="-0.0170"/>
            <vignetting model="pa" focal="190" aperture="29" distance="10" k1="-0.1540" k2="0.0650" k3="-0.0207"/>
            <vignetting model="pa" focal="190" aperture="29" distance="1000" k1="-0.1540" k2="0.0650" k3="-0.0207"/>
            <vignetting model="pa" focal="300" aperture="5.8" distance="10" k1="-0.9392" k2="0.8925" k3="-0.3859"/>
            <vignetting model="pa" focal="300" aperture="5.8" distance="1000" k1="-0.9392" k2="0.8925" k3="-0.3859"/>
            <vignetting model="pa" focal="300" aperture="8" distance="10" k1="-0.1276" k2="0.0904" k3="-0.1016"/>
            <vignetting model="pa" focal="300" aperture="8" distance="1000" k1="-0.1276" k2="0.0904" k3="-0.1016"/>
            <vignetting model="pa" focal="300" aperture="11" distance="10" k1="-0.1311" k2="0.0558" k3="-0.0171"/>
            <vignetting model="pa" focal="300" aperture="11" distance="1000" k1="-0.1311" k2="0.0558" k3="-0.0171"/>
            <vignetting model="pa" focal="300" aperture="16" distance="10" k1="-0.1260" k2="0.0467" k3="-0.0095"/>
            <vignetting model="pa" focal="300" aperture="16" distance="1000" k1="-0.1260" k2="0.0467" k3="-0.0095"/>
            <vignetting model="pa" focal="300" aperture="22" distance="10" k1="-0.1288" k2="0.0568" k3="-0.0211"/>
            <vignetting model="pa" focal="300" aperture="22" distance="1000" k1="-0.1288" k2="0.0568" k3="-0.0211"/>
            <vignetting model="pa" focal="300" aperture="32" distance="10" k1="-0.1292" k2="0.0570" k3="-0.0190"/>
            <vignetting model="pa" focal="300" aperture="32" distance="1000" k1="-0.1292" k2="0.0570" k3="-0.0190"/>
        </calibration>
    </lens>
    <lens>
        <!-- This is a copy of the smc Pentax-DA 55-300mm f/4-5.8 ED above.
             Please keep in sync. -->
        <maker>Pentax</maker>
        <model>smc Pentax-DA L 55-300mm f/4-5.8 ED</model>
        <mount>Pentax KAF2</mount>
        <!-- Average crop factor of Pentax APS-C cameras -->
        <cropfactor>1.53</cropfactor>
        <calibration>
            <!-- Taken with K-01 -->
            <distortion model="ptlens" focal="55" a="-0.00868" b="0.02017" c="-0.0181"/>
            <distortion model="ptlens" focal="70" a="-0.00225" b="0.01408" c="-0.01582"/>
            <distortion model="ptlens" focal="97.5" a="0.00246" b="0.00213" c="0.00418"/>
            <distortion model="ptlens" focal="107.5" a="-0.00444" b="0.02225" c="-0.00978"/>
            <distortion model="ptlens" focal="190" a="0.01292" b="-0.03145" c="0.03701"/>
            <distortion model="ptlens" focal="210" a="-0.0056" b="0.02291" c="-0.0044"/>
            <distortion model="ptlens" focal="300" a="-0.00162" b="0.01133" c="-0.00288"/>
            <tca model="poly3" focal="55" br="0.0000520" vr="0.9999962" bb="-0.0000776" vb="1.0002963"/>
            <tca model="poly3" focal="70" br="0.0000448" vr="0.9999714" bb="-0.0000700" vb="1.0001800"/>
            <tca model="poly3" focal="70" br="0.0000469" vr="0.9999716" bb="-0.0000747" vb="1.0001989"/>
            <tca model="poly3" focal="97.5" br="0.0000329" vr="0.9998981" bb="-0.0000718" vb="1.0000620"/>
            <tca model="poly3" focal="107.5" br="0.0000306" vr="0.9998847" bb="-0.0000745" vb="1.0000587"/>
            <tca model="poly3" focal="190" br="-0.0000425" vr="0.9997575" bb="-0.0000713" vb="0.9998580"/>
            <tca model="poly3" focal="210" br="-0.0000439" vr="0.9997405" bb="-0.0000684" vb="0.9998079"/>
            <tca model="poly3" focal="300" br="-0.0000511" vr="0.9997125" bb="-0.0000240" vb="0.9995270"/>
            <vignetting model="pa" focal="55" aperture="4" distance="10" k1="-0.4367" k2="-0.0079" k3="0.0951"/>
            <vignetting model="pa" focal="55" aperture="4" distance="1000" k1="-0.4367" k2="-0.0079" k3="0.0951"/>
            <vignetting model="pa" focal="55" aperture="5.6" distance="10" k1="-0.1654" k2="0.0298" k3="-0.0544"/>
            <vignetting model="pa" focal="55" aperture="5.6" distance="1000" k1="-0.1654" k2="0.0298" k3="-0.0544"/>
            <vignetting model="pa" focal="55" aperture="8" distance="10" k1="-0.1933" k2="0.0906" k3="-0.0561"/>
            <vignetting model="pa" focal="55" aperture="8" distance="1000" k1="-0.1933" k2="0.0906" k3="-0.0561"/>
            <vignetting model="pa" focal="55" aperture="11" distance="10" k1="-0.2047" k2="0.0685" k3="-0.0145"/>
            <vignetting model="pa" focal="55" aperture="11" distance="1000" k1="-0.2047" k2="0.0685" k3="-0.0145"/>
            <vignetting model="pa" focal="55" aperture="16" distance="10" k1="-0.1948" k2="0.1000" k3="-0.0644"/>
            <vignetting model="pa" focal="55" aperture="16" distance="1000" k1="-0.1948" k2="0.1000" k3="-0.0644"/>
            <vignetting model="pa" focal="55" aperture="22" distance="10" k1="-0.1742" k2="0.0479" k3="-0.0305"/>
            <vignetting model="pa" focal="55" aperture="22" distance="1000" k1="-0.1742" k2="0.0479" k3="-0.0305"/>
            <vignetting model="pa" focal="70" aperture="4" distance="10" k1="-0.4294" k2="-0.0506" k3="0.1512"/>
            <vignetting model="pa" focal="70" aperture="4" distance="1000" k1="-0.4294" k2="-0.0506" k3="0.1512"/>
            <vignetting model="pa" focal="70" aperture="5.6" distance="10" k1="-0.2161" k2="0.1426" k3="-0.1047"/>
            <vignetting model="pa" focal="70" aperture="5.6" distance="1000" k1="-0.2161" k2="0.1426" k3="-0.1047"/>
            <vignetting model="pa" focal="70" aperture="8" distance="10" k1="-0.2017" k2="0.0724" k3="-0.0120"/>
            <vignetting model="pa" focal="70" aperture="8" distance="1000" k1="-0.2017" k2="0.0724" k3="-0.0120"/>
            <vignetting model="pa" focal="70" aperture="11" distance="10" k1="-0.2194" k2="0.1149" k3="-0.0378"/>
            <vignetting model="pa" focal="70" aperture="11" distance="1000" k1="-0.2194" k2="0.1149" k3="-0.0378"/>
            <vignetting model="pa" focal="70" aperture="16" distance="10" k1="-0.1946" k2="0.0791" k3="-0.0240"/>
            <vignetting model="pa" focal="70" aperture="16" distance="1000" k1="-0.1946" k2="0.0791" k3="-0.0240"/>
            <vignetting model="pa" focal="70" aperture="22" distance="10" k1="-0.2081" k2="0.0946" k3="-0.0259"/>
            <vignetting model="pa" focal="70" aperture="22" distance="1000" k1="-0.2081" k2="0.0946" k3="-0.0259"/>
            <vignetting model="pa" focal="97.5" aperture="4" distance="10" k1="-0.4583" k2="0.1879" k3="-0.1581"/>
            <vignetting model="pa" focal="97.5" aperture="4" distance="1000" k1="-0.4583" k2="0.1879" k3="-0.1581"/>
            <vignetting model="pa" focal="97.5" aperture="5.6" distance="10" k1="-0.1985" k2="0.1246" k3="-0.0973"/>
            <vignetting model="pa" focal="97.5" aperture="5.6" distance="1000" k1="-0.1985" k2="0.1246" k3="-0.0973"/>
            <vignetting model="pa" focal="97.5" aperture="8" distance="10" k1="-0.1829" k2="0.0446" k3="0.0029"/>
            <vignetting model="pa" focal="97.5" aperture="8" distance="1000" k1="-0.1829" k2="0.0446" k3="0.0029"/>
            <vignetting model="pa" focal="97.5" aperture="11" distance="10" k1="-0.1932" k2="0.0702" k3="-0.0109"/>
            <vignetting model="pa" focal="97.5" aperture="11" distance="1000" k1="-0.1932" k2="0.0702" k3="-0.0109"/>
            <vignetting model="pa" focal="97.5" aperture="16" distance="10" k1="-0.1782" k2="0.0372" k3="0.0069"/>
            <vignetting model="pa" focal="97.5" aperture="16" distance="1000" k1="-0.1782" k2="0.0372" k3="0.0069"/>
            <vignetting model="pa" focal="97.5" aperture="22" distance="10" k1="-0.1656" k2="0.0113" k3="0.0131"/>
            <vignetting model="pa" focal="97.5" aperture="22" distance="1000" k1="-0.1656" k2="0.0113" k3="0.0131"/>
            <vignetting model="pa" focal="190" aperture="4.5" distance="10" k1="-0.3897" k2="-0.2654" k3="0.2262"/>
            <vignetting model="pa" focal="190" aperture="4.5" distance="1000" k1="-0.3897" k2="-0.2654" k3="0.2262"/>
            <vignetting model="pa" focal="190" aperture="5.6" distance="10" k1="-0.0663" k2="-0.5508" k3="0.2879"/>
            <vignetting model="pa" focal="190" aperture="5.6" distance="1000" k1="-0.0663" k2="-0.5508" k3="0.2879"/>
            <vignetting model="pa" focal="190" aperture="8" distance="10" k1="-0.1508" k2="0.0623" k3="-0.0219"/>
            <vignetting model="pa" focal="190" aperture="8" distance="1000" k1="-0.1508" k2="0.0623" k3="-0.0219"/>
            <vignetting model="pa" focal="190" aperture="11" distance="10" k1="-0.1449" k2="0.0423" k3="-0.0043"/>
            <vignetting model="pa" focal="190" aperture="11" distance="1000" k1="-0.1449" k2="0.0423" k3="-0.0043"/>
            <vignetting model="pa" focal="190" aperture="16" distance="10" k1="-0.1626" k2="0.0727" k3="-0.0192"/>
            <vignetting model="pa" focal="190" aperture="16" distance="1000" k1="-0.1626" k2="0.0727" k3="-0.0192"/>
            <vignetting model="pa" focal="190" aperture="22" distance="10" k1="-0.1587" k2="0.0672" k3="-0.0170"/>
            <vignetting model="pa" focal="190" aperture="22" distance="1000" k1="-0.1587" k2="0.0672" k3="-0.0170"/>
            <vignetting model="pa" focal="190" aperture="29" distance="10" k1="-0.1540" k2="0.0650" k3="-0.0207"/>
            <vignetting model="pa" focal="190" aperture="29" distance="1000" k1="-0.1540" k2="0.0650" k3="-0.0207"/>
            <vignetting model="pa" focal="300" aperture="5.8" distance="10" k1="-0.9392" k2="0.8925" k3="-0.3859"/>
            <vignetting model="pa" focal="300" aperture="5.8" distance="1000" k1="-0.9392" k2="0.8925" k3="-0.3859"/>
            <vignetting model="pa" focal="300" aperture="8" distance="10" k1="-0.1276" k2="0.0904" k3="-0.1016"/>
            <vignetting model="pa" focal="300" aperture="8" distance="1000" k1="-0.1276" k2="0.0904" k3="-0.1016"/>
            <vignetting model="pa" focal="300" aperture="11" distance="10" k1="-0.1311" k2="0.0558" k3="-0.0171"/>
            <vignetting model="pa" focal="300" aperture="11" distance="1000" k1="-0.1311" k2="0.0558" k3="-0.0171"/>
            <vignetting model="pa" focal="300" aperture="16" distance="10" k1="-0.1260" k2="0.0467" k3="-0.0095"/>
            <vignetting model="pa" focal="300" aperture="16" distance="1000" k1="-0.1260" k2="0.0467" k3="-0.0095"/>
            <vignetting model="pa" focal="300" aperture="22" distance="10" k1="-0.1288" k2="0.0568" k3="-0.0211"/>
            <vignetting model="pa" focal="300" aperture="22" distance="1000" k1="-0.1288" k2="0.0568" k3="-0.0211"/>
            <vignetting model="pa" focal="300" aperture="32" distance="10" k1="-0.1292" k2="0.0570" k3="-0.0190"/>
            <vignetting model="pa" focal="300" aperture="32" distance="1000" k1="-0.1292" k2="0.0570" k3="-0.0190"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-DA 55-300mm f/4-5.8 ED</model>
        <mount>Pentax KAF</mount>
        <cropfactor>1.522</cropfactor>
        <calibration>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-DA 15mm f/4 ED AL Limited</model>
        <mount>Pentax KAF2</mount>
        <!-- Average crop factor of Pentax APS-C cameras -->
        <cropfactor>1.53</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="15" a="0.00305" b="0.00418" c="-0.01276"/>
            <tca model="poly3" focal="15" br="-0.0000314" vr="1.0005721" bb="0.0000869" vb="0.9999889"/>
            <tca model="poly3" focal="15" br="-0.0000370" vr="1.0005702" bb="0.0000869" vb="0.9999918"/>
            <tca model="poly3" focal="15" br="-0.0001275" vr="1.0006628" bb="0.0000063" vb="1.0000738"/>
            <vignetting model="pa" focal="15" aperture="4" distance="0.18" k1="-0.5838" k2="-0.1163" k3="0.1375"/>
            <vignetting model="pa" focal="15" aperture="4" distance="1000" k1="-0.5817" k2="-0.4431" k3="0.3722"/>
            <vignetting model="pa" focal="15" aperture="5.6" distance="0.18" k1="-0.4834" k2="0.3429" k3="-0.2120"/>
            <vignetting model="pa" focal="15" aperture="5.6" distance="1000" k1="-0.5629" k2="0.5126" k3="-0.3451"/>
            <vignetting model="pa" focal="15" aperture="8" distance="0.18" k1="-0.4770" k2="0.2792" k3="-0.1004"/>
            <vignetting model="pa" focal="15" aperture="8" distance="1000" k1="-0.5111" k2="0.2703" k3="-0.0816"/>
            <vignetting model="pa" focal="15" aperture="11" distance="0.18" k1="-0.4775" k2="0.2770" k3="-0.0985"/>
            <vignetting model="pa" focal="15" aperture="11" distance="1000" k1="-0.5117" k2="0.2676" k3="-0.0796"/>
            <vignetting model="pa" focal="15" aperture="22" distance="0.18" k1="-0.4794" k2="0.2759" k3="-0.0990"/>
            <vignetting model="pa" focal="15" aperture="22" distance="1000" k1="-0.5126" k2="0.2608" k3="-0.0756"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax K 30mm f/2.8</model>
        <mount>Pentax K</mount>
        <!-- Average crop factor of Pentax APS-C cameras -->
        <cropfactor>1.53</cropfactor>
        <calibration>
            <distortion model="poly3" focal="30" k1="-0.00537"/>
            <tca model="poly3" focal="30" br="0.0000083" vr="1.0002" bb="0.00008" vb="0.99976"/>
            <vignetting model="pa" focal="30" aperture="11" distance="1000" k1="-0.36804" k2="0.318" k3="-0.18433"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-DA 40mm f/2.8 Limited</model>
        <mount>Pentax KAF2</mount>
        <!-- Average crop factor of Pentax APS-C cameras -->
        <cropfactor>1.53</cropfactor>
        <calibration>
            <distortion model="poly3" focal="40" k1="-0.00384"/>
            <tca model="poly3" focal="40" br="-0.0000230" vr="1.0001421" bb="0.0000150" vb="0.9999150"/>
            <vignetting model="pa" focal="40" aperture="11" distance="1000" k1="-0.17248" k2="0.21247" k3="-0.13119"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-DA 40mm f/2.8 XS</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-1 -->
            <distortion model="ptlens" focal="40" a="0.00084" b="0.0026" c="-0.01446"/>
            <tca model="poly3" focal="40.0" br="-0.0000344" vr="1.0002530" bb="0.0000659" vb="0.9998578"/>
            <vignetting model="pa" focal="40" aperture="2.8" distance="10" k1="-1.6422" k2="1.4812" k3="-0.6072"/>
            <vignetting model="pa" focal="40" aperture="2.8" distance="1000" k1="-1.6422" k2="1.4812" k3="-0.6072"/>
            <vignetting model="pa" focal="40" aperture="4" distance="10" k1="-0.4285" k2="-0.7416" k3="0.5401"/>
            <vignetting model="pa" focal="40" aperture="4" distance="1000" k1="-0.4285" k2="-0.7416" k3="0.5401"/>
            <vignetting model="pa" focal="40" aperture="5.6" distance="10" k1="-0.5051" k2="0.1224" k3="-0.1631"/>
            <vignetting model="pa" focal="40" aperture="5.6" distance="1000" k1="-0.5051" k2="0.1224" k3="-0.1631"/>
            <vignetting model="pa" focal="40" aperture="8" distance="10" k1="-0.5724" k2="0.3651" k3="-0.2500"/>
            <vignetting model="pa" focal="40" aperture="8" distance="1000" k1="-0.5724" k2="0.3651" k3="-0.2500"/>
            <vignetting model="pa" focal="40" aperture="11" distance="10" k1="-0.5495" k2="0.0721" k3="0.0591"/>
            <vignetting model="pa" focal="40" aperture="11" distance="1000" k1="-0.5495" k2="0.0721" k3="0.0591"/>
            <vignetting model="pa" focal="40" aperture="16" distance="10" k1="-0.5480" k2="0.0905" k3="0.0287"/>
            <vignetting model="pa" focal="40" aperture="16" distance="1000" k1="-0.5480" k2="0.0905" k3="0.0287"/>
            <vignetting model="pa" focal="40" aperture="22" distance="10" k1="-0.6683" k2="0.3178" k3="-0.0722"/>
            <vignetting model="pa" focal="40" aperture="22" distance="1000" k1="-0.6683" k2="0.3178" k3="-0.0722"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-FA 43mm f/1.9 Limited</model>
        <mount>Pentax KAF2</mount>
        <!-- Average crop factor of Pentax APS-C cameras -->
        <cropfactor>1.53</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="43" a="-0.00469" b="0.01317" c="-0"/>
            <tca model="poly3" focal="43" br="-0.0000002" vr="1.0004216" bb="0.0000154" vb="0.9996758"/>
            <tca model="poly3" focal="43" br="-0.0000052" vr="1.0003816" bb="0.0000293" vb="0.9997198"/>
            <tca model="poly3" focal="43" br="-0.0000240" vr="1.0003765" bb="0.0000283" vb="0.9997431"/>
            <tca model="poly3" focal="43" br="0.0000277" vr="1.0003967" bb="-0.0000121" vb="0.9997040"/>
            <tca model="poly3" focal="43" br="0.0000411" vr="1.0003521" bb="0.0000012" vb="0.9996986"/>
            <vignetting model="pa" focal="43" aperture="1.9" distance="0.45" k1="-0.6622" k2="0.4306" k3="-0.1437"/>
            <vignetting model="pa" focal="43" aperture="1.9" distance="1000" k1="-0.8815" k2="0.7667" k3="-0.3234"/>
            <vignetting model="pa" focal="43" aperture="2.8" distance="0.45" k1="-0.1673" k2="0.0212" k3="0.0073"/>
            <vignetting model="pa" focal="43" aperture="2.8" distance="1000" k1="-0.2041" k2="0.0207" k3="0.0152"/>
            <vignetting model="pa" focal="43" aperture="4" distance="0.45" k1="-0.1679" k2="0.0215" k3="0.0114"/>
            <vignetting model="pa" focal="43" aperture="4" distance="1000" k1="-0.2129" k2="0.0349" k3="0.0118"/>
            <vignetting model="pa" focal="43" aperture="5.6" distance="0.45" k1="-0.1754" k2="0.0408" k3="-0.0015"/>
            <vignetting model="pa" focal="43" aperture="5.6" distance="1000" k1="-0.2232" k2="0.0558" k3="-0.0010"/>
            <vignetting model="pa" focal="43" aperture="22" distance="0.45" k1="-0.2472" k2="0.1832" k3="-0.0817"/>
            <vignetting model="pa" focal="43" aperture="22" distance="1000" k1="-0.2885" k2="0.1864" k3="-0.0748"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-FA 77mm f/1.8 Limited</model>
        <mount>Pentax KAF3</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taken with Pentax K1 -->
            <distortion model="poly3" focal="77" k1="0.001454"/>
            <tca model="poly3" focal="77" vr="0.9998536" vb="0.9999614"/>
            <vignetting model="pa" focal="77" aperture="1.8" distance="10" k1="-1.3375" k2="1.3579" k3="-0.6336"/>
            <vignetting model="pa" focal="77" aperture="1.8" distance="1000" k1="-1.3375" k2="1.3579" k3="-0.6336"/>
            <vignetting model="pa" focal="77" aperture="2" distance="10" k1="-0.8871" k2="0.3955" k3="-0.0728"/>
            <vignetting model="pa" focal="77" aperture="2" distance="1000" k1="-0.8871" k2="0.3955" k3="-0.0728"/>
            <vignetting model="pa" focal="77" aperture="2.8" distance="10" k1="-0.2028" k2="0.1041" k3="-0.1821"/>
            <vignetting model="pa" focal="77" aperture="2.8" distance="1000" k1="-0.2028" k2="0.1041" k3="-0.1821"/>
            <vignetting model="pa" focal="77" aperture="4" distance="10" k1="-0.2092" k2="-0.0059" k3="0.0327"/>
            <vignetting model="pa" focal="77" aperture="4" distance="1000" k1="-0.2092" k2="-0.0059" k3="0.0327"/>
            <vignetting model="pa" focal="77" aperture="5.6" distance="10" k1="-0.2048" k2="-0.0228" k3="0.0436"/>
            <vignetting model="pa" focal="77" aperture="5.6" distance="1000" k1="-0.2048" k2="-0.0228" k3="0.0436"/>
            <vignetting model="pa" focal="77" aperture="8" distance="10" k1="-0.2176" k2="0.0126" k3="0.0147"/>
            <vignetting model="pa" focal="77" aperture="8" distance="1000" k1="-0.2176" k2="0.0126" k3="0.0147"/>
            <vignetting model="pa" focal="77" aperture="11" distance="10" k1="-0.2172" k2="0.0074" k3="0.0174"/>
            <vignetting model="pa" focal="77" aperture="11" distance="1000" k1="-0.2172" k2="0.0074" k3="0.0174"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>Takumar 135mm f/2.5 Bayonet</model>
        <mount>Pentax K</mount>
        <!-- Average crop factor of Pentax APS-C cameras -->
        <cropfactor>1.53</cropfactor>
        <calibration>
            <distortion model="poly3" focal="135" k1="0.00185"/>
            <tca model="poly3" focal="135" br="0.0000400" vr="0.999887" bb="-0.00012" vb="1.0002"/>
            <vignetting model="pa" focal="135" aperture="11" distance="1000" k1="-0.40098" k2="0.46402" k3="-0.26756"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-M 50mm f/1.7</model>
        <mount>Pentax K</mount>
        <cropfactor>1.526</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-5 II -->
            <distortion model="ptlens" focal="50" a="0.00266415" b="-0.0099024" c="0.0120246"/>
            <tca model="poly3" focal="50" br="-0.0000256" vr="1.0000546" bb="-0.0000066" vb="0.9999937"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-M 50mm f/2</model>
        <mount>Pentax K</mount>
        <!-- Average crop factor of Pentax APS-C cameras -->
        <cropfactor>1.53</cropfactor>
        <calibration>
            <distortion model="poly3" focal="50" k1="-0.00239"/>
            <tca model="poly3" focal="50" br="0.0000100" vr="1.00005" bb="-0.0000100" vb="0.99974"/>
            <vignetting model="pa" focal="50" aperture="11" distance="1000" k1="-0.30738" k2="0.29474" k3="-0.16389"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-D FA Macro 100mm f/2.8 WR</model>
        <mount>Pentax KAF2</mount>
        <!-- Average crop factor of Pentax APS-C cameras -->
        <cropfactor>1.53</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="100" a="0.00355" b="-0.01675" c="0.02729"/>
            <tca model="poly3" focal="100" br="0.0000044" vr="0.9999354" bb="-0.0000404" vb="0.9997796"/>
            <tca model="poly3" focal="100" br="0.0000051" vr="0.9999355" bb="-0.0000111" vb="0.9997510"/>
            <tca model="poly3" focal="100" br="0.0000135" vr="0.9999237" bb="0.0000050" vb="0.9997609"/>
            <tca model="poly3" focal="100" br="0.0000160" vr="0.9999237" bb="0.0000027" vb="0.9998788"/>
            <tca model="poly3" focal="100" br="0.0000167" vr="0.9998977" bb="0.0000079" vb="0.9998621"/>
            <vignetting model="pa" focal="100" aperture="2.8" distance="0.3" k1="-0.0519" k2="-0.0004" k3="0.0078"/>
            <vignetting model="pa" focal="100" aperture="2.8" distance="1000" k1="-0.6568" k2="0.6101" k3="-0.2619"/>
            <vignetting model="pa" focal="100" aperture="4" distance="0.3" k1="-0.0530" k2="0.0032" k3="0.0058"/>
            <vignetting model="pa" focal="100" aperture="4" distance="1000" k1="-0.0160" k2="-0.4279" k3="0.2562"/>
            <vignetting model="pa" focal="100" aperture="5.6" distance="0.3" k1="-0.0558" k2="0.0059" k3="0.0055"/>
            <vignetting model="pa" focal="100" aperture="5.6" distance="1000" k1="-0.0952" k2="-0.0017" k3="0.0219"/>
            <vignetting model="pa" focal="100" aperture="8" distance="0.3" k1="-0.0639" k2="0.0263" k3="-0.0075"/>
            <vignetting model="pa" focal="100" aperture="8" distance="1000" k1="-0.1030" k2="0.0156" k3="0.0117"/>
            <vignetting model="pa" focal="100" aperture="32" distance="0.3" k1="-0.0485" k2="-0.0204" k3="0.0258"/>
            <vignetting model="pa" focal="100" aperture="32" distance="1000" k1="-0.1224" k2="0.0565" k3="-0.0130"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-D FA Macro 100mm f/2.8 WR</model>
        <mount>Pentax KAF</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-1 -->
            <distortion model="poly3" focal="100" k1="-0.00138"/>
            <tca model="poly3" focal="100" vr="1.0000068" vb="0.9998818"/>
            <vignetting model="pa" focal="100" aperture="2.8" distance="10" k1="-1.1510" k2="1.2153" k3="-0.5766"/>
            <vignetting model="pa" focal="100" aperture="2.8" distance="1000" k1="-1.1510" k2="1.2153" k3="-0.5766"/>
            <vignetting model="pa" focal="100" aperture="4" distance="10" k1="-0.1576" k2="-0.6965" k3="0.4759"/>
            <vignetting model="pa" focal="100" aperture="4" distance="1000" k1="-0.1576" k2="-0.6965" k3="0.4759"/>
            <vignetting model="pa" focal="100" aperture="5.6" distance="10" k1="-0.1123" k2="-0.1852" k3="0.0025"/>
            <vignetting model="pa" focal="100" aperture="5.6" distance="1000" k1="-0.1123" k2="-0.1852" k3="0.0025"/>
            <vignetting model="pa" focal="100" aperture="8" distance="10" k1="-0.2088" k2="0.0920" k3="-0.0702"/>
            <vignetting model="pa" focal="100" aperture="8" distance="1000" k1="-0.2088" k2="0.0920" k3="-0.0702"/>
            <vignetting model="pa" focal="100" aperture="11" distance="10" k1="-0.1613" k2="-0.0974" k3="0.1002"/>
            <vignetting model="pa" focal="100" aperture="11" distance="1000" k1="-0.1613" k2="-0.0974" k3="0.1002"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-M 150mm f/3.5</model>
        <mount>Pentax K</mount>
        <!-- Average crop factor of Pentax APS-C cameras -->
        <cropfactor>1.53</cropfactor>
        <calibration>
            <distortion model="poly3" focal="150" k1="0.00133"/>
            <tca model="poly3" focal="150" br="-0.00001" vr="0.9999" bb="-0.00005" vb="1.00007"/>
            <vignetting model="pa" focal="150" aperture="11" distance="1000" k1="-0.45436" k2="0.68491" k3="-0.48506"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-DA 35mm f/2.4 AL</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.526</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-30 -->
            <distortion model="poly3" focal="35" k1="-0.0038"/>
            <!-- Taken with Pentax K-20 and a crop factor of 1.538 -->
            <tca model="poly3" focal="35" vr="1.0003130" vb="0.9998969"/>
            <vignetting model="pa" focal="35" aperture="2.4" distance="10" k1="-0.8061" k2="0.4347" k3="-0.1091"/>
            <vignetting model="pa" focal="35" aperture="2.4" distance="1000" k1="-0.8061" k2="0.4347" k3="-0.1091"/>
            <vignetting model="pa" focal="35" aperture="2.8" distance="10" k1="-0.4977" k2="-0.1214" k3="0.1835"/>
            <vignetting model="pa" focal="35" aperture="2.8" distance="1000" k1="-0.4977" k2="-0.1214" k3="0.1835"/>
            <vignetting model="pa" focal="35" aperture="3.2" distance="10" k1="-0.2246" k2="-0.4345" k3="0.2930"/>
            <vignetting model="pa" focal="35" aperture="3.2" distance="1000" k1="-0.2246" k2="-0.4345" k3="0.2930"/>
            <vignetting model="pa" focal="35" aperture="4" distance="10" k1="-0.2159" k2="0.0471" k3="-0.0511"/>
            <vignetting model="pa" focal="35" aperture="4" distance="1000" k1="-0.2159" k2="0.0471" k3="-0.0511"/>
            <vignetting model="pa" focal="35" aperture="5.6" distance="10" k1="-0.2181" k2="0.0344" k3="0.0057"/>
            <vignetting model="pa" focal="35" aperture="5.6" distance="1000" k1="-0.2181" k2="0.0344" k3="0.0057"/>
            <vignetting model="pa" focal="35" aperture="8" distance="10" k1="-0.2257" k2="0.0476" k3="-0.0010"/>
            <vignetting model="pa" focal="35" aperture="8" distance="1000" k1="-0.2257" k2="0.0476" k3="-0.0010"/>
            <vignetting model="pa" focal="35" aperture="11" distance="10" k1="-0.2233" k2="0.0485" k3="-0.0046"/>
            <vignetting model="pa" focal="35" aperture="11" distance="1000" k1="-0.2233" k2="0.0485" k3="-0.0046"/>
            <vignetting model="pa" focal="35" aperture="16" distance="10" k1="-0.2197" k2="0.0419" k3="-0.0017"/>
            <vignetting model="pa" focal="35" aperture="16" distance="1000" k1="-0.2197" k2="0.0419" k3="-0.0017"/>
            <vignetting model="pa" focal="35" aperture="22" distance="10" k1="-0.2166" k2="0.0363" k3="0.0025"/>
            <vignetting model="pa" focal="35" aperture="22" distance="1000" k1="-0.2166" k2="0.0363" k3="0.0025"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-DA 35mm f/2.4 AL</model>
        <mount>Pentax KAF</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-1 -->
            <distortion model="ptlens" focal="35" a="0.00556398" b="-0.0130605" c="-0.00889064"/>
            <tca model="poly3" focal="35" br="-0.0000898" vr="1.0003099" bb="0.0001118" vb="0.9998355"/>
        </calibration>
    </lens>
    <lens>
        <!-- This is an alias of smc Pentax-DA 70mm f/2.4 Limited.  According
             to da...@corr.eu.org, they are optically equivalent. -->
        <maker>Pentax</maker>
        <model>HD Pentax-DA 70mm f/2.4 Limited</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.534</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-70 -->
            <distortion model="poly3" focal="70" k1="0.000985364"/>
            <tca model="poly3" focal="70" vr="0.9997643" vb="0.9999367"/>
            <!-- Taken with Pentax K-01 -->
            <vignetting model="pa" focal="70" aperture="2.4" distance="10" k1="-1.0107" k2="0.9987" k3="-0.4562"/>
            <vignetting model="pa" focal="70" aperture="2.4" distance="1000" k1="-1.0107" k2="0.9987" k3="-0.4562"/>
            <vignetting model="pa" focal="70" aperture="2.8" distance="10" k1="-0.5659" k2="0.1645" k3="-0.0074"/>
            <vignetting model="pa" focal="70" aperture="2.8" distance="1000" k1="-0.5659" k2="0.1645" k3="-0.0074"/>
            <vignetting model="pa" focal="70" aperture="4" distance="10" k1="-0.2248" k2="0.1421" k3="-0.0974"/>
            <vignetting model="pa" focal="70" aperture="4" distance="1000" k1="-0.2248" k2="0.1421" k3="-0.0974"/>
            <vignetting model="pa" focal="70" aperture="5.6" distance="10" k1="-0.2177" k2="0.0814" k3="-0.0211"/>
            <vignetting model="pa" focal="70" aperture="5.6" distance="1000" k1="-0.2177" k2="0.0814" k3="-0.0211"/>
            <vignetting model="pa" focal="70" aperture="8" distance="10" k1="-0.2203" k2="0.0954" k3="-0.0378"/>
            <vignetting model="pa" focal="70" aperture="8" distance="1000" k1="-0.2203" k2="0.0954" k3="-0.0378"/>
            <vignetting model="pa" focal="70" aperture="11" distance="10" k1="-0.2259" k2="0.0927" k3="-0.0268"/>
            <vignetting model="pa" focal="70" aperture="11" distance="1000" k1="-0.2259" k2="0.0927" k3="-0.0268"/>
            <vignetting model="pa" focal="70" aperture="16" distance="10" k1="-0.2153" k2="0.0612" k3="0.0037"/>
            <vignetting model="pa" focal="70" aperture="16" distance="1000" k1="-0.2153" k2="0.0612" k3="0.0037"/>
            <vignetting model="pa" focal="70" aperture="22" distance="10" k1="-0.1986" k2="0.0185" k3="0.0310"/>
            <vignetting model="pa" focal="70" aperture="22" distance="1000" k1="-0.1986" k2="0.0185" k3="0.0310"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-DA 70mm f/2.4 Limited</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.534</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-70 -->
            <distortion model="poly3" focal="70" k1="0.000985364"/>
            <tca model="poly3" focal="70" vr="0.9997643" vb="0.9999367"/>
            <!-- Taken with Pentax K-01 -->
            <vignetting model="pa" focal="70" aperture="2.4" distance="10" k1="-1.0107" k2="0.9987" k3="-0.4562"/>
            <vignetting model="pa" focal="70" aperture="2.4" distance="1000" k1="-1.0107" k2="0.9987" k3="-0.4562"/>
            <vignetting model="pa" focal="70" aperture="2.8" distance="10" k1="-0.5659" k2="0.1645" k3="-0.0074"/>
            <vignetting model="pa" focal="70" aperture="2.8" distance="1000" k1="-0.5659" k2="0.1645" k3="-0.0074"/>
            <vignetting model="pa" focal="70" aperture="4" distance="10" k1="-0.2248" k2="0.1421" k3="-0.0974"/>
            <vignetting model="pa" focal="70" aperture="4" distance="1000" k1="-0.2248" k2="0.1421" k3="-0.0974"/>
            <vignetting model="pa" focal="70" aperture="5.6" distance="10" k1="-0.2177" k2="0.0814" k3="-0.0211"/>
            <vignetting model="pa" focal="70" aperture="5.6" distance="1000" k1="-0.2177" k2="0.0814" k3="-0.0211"/>
            <vignetting model="pa" focal="70" aperture="8" distance="10" k1="-0.2203" k2="0.0954" k3="-0.0378"/>
            <vignetting model="pa" focal="70" aperture="8" distance="1000" k1="-0.2203" k2="0.0954" k3="-0.0378"/>
            <vignetting model="pa" focal="70" aperture="11" distance="10" k1="-0.2259" k2="0.0927" k3="-0.0268"/>
            <vignetting model="pa" focal="70" aperture="11" distance="1000" k1="-0.2259" k2="0.0927" k3="-0.0268"/>
            <vignetting model="pa" focal="70" aperture="16" distance="10" k1="-0.2153" k2="0.0612" k3="0.0037"/>
            <vignetting model="pa" focal="70" aperture="16" distance="1000" k1="-0.2153" k2="0.0612" k3="0.0037"/>
            <vignetting model="pa" focal="70" aperture="22" distance="10" k1="-0.1986" k2="0.0185" k3="0.0310"/>
            <vignetting model="pa" focal="70" aperture="22" distance="1000" k1="-0.1986" k2="0.0185" k3="0.0310"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-DA* 50-135mm f/2.8 ED IF SDM</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.526</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-30 -->
            <distortion model="poly3" focal="50" k1="-0.00786"/>
            <distortion model="poly3" focal="63" k1="-0.00367"/>
            <distortion model="poly3" focal="70" k1="0.00052"/>
            <distortion model="poly3" focal="75" k1="-0.00155"/>
            <distortion model="poly3" focal="95" k1="0.00337"/>
            <distortion model="poly3" focal="108" k1="0.00464"/>
            <distortion model="poly3" focal="135" k1="0.00586"/>
            <tca model="poly3" focal="50" vr="1.0003343" vb="0.9998633"/>
            <tca model="poly3" focal="63" vr="1.0001639" vb="0.9999264"/>
            <tca model="poly3" focal="70" vr="1.0000366" vb="0.9999579"/>
            <tca model="poly3" focal="75" vr="1.0000653" vb="0.9999403"/>
            <tca model="poly3" focal="95" vr="0.9999718" vb="0.9998939"/>
            <tca model="poly3" focal="108" vr="0.9999556" vb="0.9998626"/>
            <tca model="poly3" focal="135" vr="0.9999410" vb="0.9996804"/>
            <!-- Taken with Pentax K-5 II -->
            <vignetting model="pa" focal="50" aperture="2.8" distance="10" k1="-0.5219" k2="0.3879" k3="-0.2569"/>
            <vignetting model="pa" focal="50" aperture="2.8" distance="1000" k1="-0.5219" k2="0.3879" k3="-0.2569"/>
            <vignetting model="pa" focal="50" aperture="3.5" distance="10" k1="-0.1032" k2="-0.1508" k3="-0.0429"/>
            <vignetting model="pa" focal="50" aperture="3.5" distance="1000" k1="-0.1032" k2="-0.1508" k3="-0.0429"/>
            <vignetting model="pa" focal="50" aperture="4" distance="10" k1="-0.1785" k2="0.2736" k3="-0.3085"/>
            <vignetting model="pa" focal="50" aperture="4" distance="1000" k1="-0.1785" k2="0.2736" k3="-0.3085"/>
            <vignetting model="pa" focal="50" aperture="4.5" distance="10" k1="-0.1865" k2="0.2555" k3="-0.2344"/>
            <vignetting model="pa" focal="50" aperture="4.5" distance="1000" k1="-0.1865" k2="0.2555" k3="-0.2344"/>
            <vignetting model="pa" focal="50" aperture="5.6" distance="10" k1="-0.1666" k2="0.1604" k3="-0.1341"/>
            <vignetting model="pa" focal="50" aperture="5.6" distance="1000" k1="-0.1666" k2="0.1604" k3="-0.1341"/>
            <vignetting model="pa" focal="50" aperture="6.7" distance="10" k1="-0.1526" k2="0.1031" k3="-0.0798"/>
            <vignetting model="pa" focal="50" aperture="6.7" distance="1000" k1="-0.1526" k2="0.1031" k3="-0.0798"/>
            <vignetting model="pa" focal="50" aperture="8" distance="10" k1="-0.1543" k2="0.1080" k3="-0.0830"/>
            <vignetting model="pa" focal="50" aperture="8" distance="1000" k1="-0.1543" k2="0.1080" k3="-0.0830"/>
            <vignetting model="pa" focal="50" aperture="9.5" distance="10" k1="-0.1567" k2="0.1140" k3="-0.0868"/>
            <vignetting model="pa" focal="50" aperture="9.5" distance="1000" k1="-0.1567" k2="0.1140" k3="-0.0868"/>
            <vignetting model="pa" focal="50" aperture="11" distance="10" k1="-0.1579" k2="0.1180" k3="-0.0899"/>
            <vignetting model="pa" focal="50" aperture="11" distance="1000" k1="-0.1579" k2="0.1180" k3="-0.0899"/>
            <vignetting model="pa" focal="63" aperture="2.8" distance="10" k1="-0.4650" k2="0.4721" k3="-0.3874"/>
            <vignetting model="pa" focal="63" aperture="2.8" distance="1000" k1="-0.4650" k2="0.4721" k3="-0.3874"/>
            <vignetting model="pa" focal="63" aperture="3.5" distance="10" k1="-0.1333" k2="0.1220" k3="-0.2921"/>
            <vignetting model="pa" focal="63" aperture="3.5" distance="1000" k1="-0.1333" k2="0.1220" k3="-0.2921"/>
            <vignetting model="pa" focal="63" aperture="4" distance="10" k1="-0.2373" k2="0.5212" k3="-0.5011"/>
            <vignetting model="pa" focal="63" aperture="4" distance="1000" k1="-0.2373" k2="0.5212" k3="-0.5011"/>
            <vignetting model="pa" focal="63" aperture="4.5" distance="10" k1="-0.2130" k2="0.4030" k3="-0.3658"/>
            <vignetting model="pa" focal="63" aperture="4.5" distance="1000" k1="-0.2130" k2="0.4030" k3="-0.3658"/>
            <vignetting model="pa" focal="63" aperture="5.6" distance="10" k1="-0.1820" k2="0.2641" k3="-0.2274"/>
            <vignetting model="pa" focal="63" aperture="5.6" distance="1000" k1="-0.1820" k2="0.2641" k3="-0.2274"/>
            <vignetting model="pa" focal="63" aperture="6.7" distance="10" k1="-0.1399" k2="0.1001" k3="-0.0774"/>
            <vignetting model="pa" focal="63" aperture="6.7" distance="1000" k1="-0.1399" k2="0.1001" k3="-0.0774"/>
            <vignetting model="pa" focal="63" aperture="8" distance="10" k1="-0.1407" k2="0.0984" k3="-0.0734"/>
            <vignetting model="pa" focal="63" aperture="8" distance="1000" k1="-0.1407" k2="0.0984" k3="-0.0734"/>
            <vignetting model="pa" focal="63" aperture="9.5" distance="10" k1="-0.1416" k2="0.0996" k3="-0.0731"/>
            <vignetting model="pa" focal="63" aperture="9.5" distance="1000" k1="-0.1416" k2="0.0996" k3="-0.0731"/>
            <vignetting model="pa" focal="63" aperture="11" distance="10" k1="-0.1431" k2="0.1039" k3="-0.0766"/>
            <vignetting model="pa" focal="63" aperture="11" distance="1000" k1="-0.1431" k2="0.1039" k3="-0.0766"/>
            <vignetting model="pa" focal="75" aperture="2.8" distance="10" k1="-0.3264" k2="0.2025" k3="-0.3131"/>
            <vignetting model="pa" focal="75" aperture="2.8" distance="1000" k1="-0.3264" k2="0.2025" k3="-0.3131"/>
            <vignetting model="pa" focal="75" aperture="3.5" distance="10" k1="-0.0353" k2="-0.0719" k3="-0.2639"/>
            <vignetting model="pa" focal="75" aperture="3.5" distance="1000" k1="-0.0353" k2="-0.0719" k3="-0.2639"/>
            <vignetting model="pa" focal="75" aperture="4" distance="10" k1="-0.1978" k2="0.4842" k3="-0.5732"/>
            <vignetting model="pa" focal="75" aperture="4" distance="1000" k1="-0.1978" k2="0.4842" k3="-0.5732"/>
            <vignetting model="pa" focal="75" aperture="4.5" distance="10" k1="-0.2288" k2="0.5538" k3="-0.5654"/>
            <vignetting model="pa" focal="75" aperture="4.5" distance="1000" k1="-0.2288" k2="0.5538" k3="-0.5654"/>
            <vignetting model="pa" focal="75" aperture="5.6" distance="10" k1="-0.2323" k2="0.5285" k3="-0.5025"/>
            <vignetting model="pa" focal="75" aperture="5.6" distance="1000" k1="-0.2323" k2="0.5285" k3="-0.5025"/>
            <vignetting model="pa" focal="75" aperture="6.7" distance="10" k1="-0.1877" k2="0.3202" k3="-0.2807"/>
            <vignetting model="pa" focal="75" aperture="6.7" distance="1000" k1="-0.1877" k2="0.3202" k3="-0.2807"/>
            <vignetting model="pa" focal="75" aperture="8" distance="10" k1="-0.1368" k2="0.1149" k3="-0.0896"/>
            <vignetting model="pa" focal="75" aperture="8" distance="1000" k1="-0.1368" k2="0.1149" k3="-0.0896"/>
            <vignetting model="pa" focal="75" aperture="9.5" distance="10" k1="-0.1342" k2="0.0964" k3="-0.0698"/>
            <vignetting model="pa" focal="75" aperture="9.5" distance="1000" k1="-0.1342" k2="0.0964" k3="-0.0698"/>
            <vignetting model="pa" focal="75" aperture="11" distance="10" k1="-0.1359" k2="0.1011" k3="-0.0731"/>
            <vignetting model="pa" focal="75" aperture="11" distance="1000" k1="-0.1359" k2="0.1011" k3="-0.0731"/>
            <vignetting model="pa" focal="95" aperture="2.8" distance="10" k1="-0.1002" k2="-0.6727" k3="0.3072"/>
            <vignetting model="pa" focal="95" aperture="2.8" distance="1000" k1="-0.1002" k2="-0.6727" k3="0.3072"/>
            <vignetting model="pa" focal="95" aperture="3.5" distance="10" k1="0.1503" k2="-0.8768" k3="0.3289"/>
            <vignetting model="pa" focal="95" aperture="3.5" distance="1000" k1="0.1503" k2="-0.8768" k3="0.3289"/>
            <vignetting model="pa" focal="95" aperture="4" distance="10" k1="-0.0157" k2="-0.1187" k3="-0.1951"/>
            <vignetting model="pa" focal="95" aperture="4" distance="1000" k1="-0.0157" k2="-0.1187" k3="-0.1951"/>
            <vignetting model="pa" focal="95" aperture="4.5" distance="10" k1="-0.1339" k2="0.2905" k3="-0.4368"/>
            <vignetting model="pa" focal="95" aperture="4.5" distance="1000" k1="-0.1339" k2="0.2905" k3="-0.4368"/>
            <vignetting model="pa" focal="95" aperture="5.6" distance="10" k1="-0.1861" k2="0.4445" k3="-0.5054"/>
            <vignetting model="pa" focal="95" aperture="5.6" distance="1000" k1="-0.1861" k2="0.4445" k3="-0.5054"/>
            <vignetting model="pa" focal="95" aperture="6.7" distance="10" k1="-0.2024" k2="0.4379" k3="-0.4178"/>
            <vignetting model="pa" focal="95" aperture="6.7" distance="1000" k1="-0.2024" k2="0.4379" k3="-0.4178"/>
            <vignetting model="pa" focal="95" aperture="8" distance="10" k1="-0.1620" k2="0.2444" k3="-0.2092"/>
            <vignetting model="pa" focal="95" aperture="8" distance="1000" k1="-0.1620" k2="0.2444" k3="-0.2092"/>
            <vignetting model="pa" focal="95" aperture="9.5" distance="10" k1="-0.1265" k2="0.0928" k3="-0.0656"/>
            <vignetting model="pa" focal="95" aperture="9.5" distance="1000" k1="-0.1265" k2="0.0928" k3="-0.0656"/>
            <vignetting model="pa" focal="95" aperture="11" distance="10" k1="-0.1311" k2="0.1012" k3="-0.0698"/>
            <vignetting model="pa" focal="95" aperture="11" distance="1000" k1="-0.1311" k2="0.1012" k3="-0.0698"/>
            <vignetting model="pa" focal="135" aperture="2.8" distance="10" k1="-0.4911" k2="-0.2737" k3="0.2751"/>
            <vignetting model="pa" focal="135" aperture="2.8" distance="1000" k1="-0.4911" k2="-0.2737" k3="0.2751"/>
            <vignetting model="pa" focal="135" aperture="3.5" distance="10" k1="-0.1401" k2="-0.8317" k3="0.5450"/>
            <vignetting model="pa" focal="135" aperture="3.5" distance="1000" k1="-0.1401" k2="-0.8317" k3="0.5450"/>
            <vignetting model="pa" focal="135" aperture="4" distance="10" k1="0.1172" k2="-0.8981" k3="0.4452"/>
            <vignetting model="pa" focal="135" aperture="4" distance="1000" k1="0.1172" k2="-0.8981" k3="0.4452"/>
            <vignetting model="pa" focal="135" aperture="4.5" distance="10" k1="0.0586" k2="-0.4735" k3="0.1209"/>
            <vignetting model="pa" focal="135" aperture="4.5" distance="1000" k1="0.0586" k2="-0.4735" k3="0.1209"/>
            <vignetting model="pa" focal="135" aperture="5.6" distance="10" k1="-0.0381" k2="-0.0710" k3="-0.1489"/>
            <vignetting model="pa" focal="135" aperture="5.6" distance="1000" k1="-0.0381" k2="-0.0710" k3="-0.1489"/>
            <vignetting model="pa" focal="135" aperture="6.7" distance="10" k1="-0.1495" k2="0.2878" k3="-0.3328"/>
            <vignetting model="pa" focal="135" aperture="6.7" distance="1000" k1="-0.1495" k2="0.2878" k3="-0.3328"/>
            <vignetting model="pa" focal="135" aperture="8" distance="10" k1="-0.1498" k2="0.2196" k3="-0.1947"/>
            <vignetting model="pa" focal="135" aperture="8" distance="1000" k1="-0.1498" k2="0.2196" k3="-0.1947"/>
            <vignetting model="pa" focal="135" aperture="9.5" distance="10" k1="-0.1127" k2="0.0656" k3="-0.0447"/>
            <vignetting model="pa" focal="135" aperture="9.5" distance="1000" k1="-0.1127" k2="0.0656" k3="-0.0447"/>
            <vignetting model="pa" focal="135" aperture="11" distance="10" k1="-0.1189" k2="0.0784" k3="-0.0518"/>
            <vignetting model="pa" focal="135" aperture="11" distance="1000" k1="-0.1189" k2="0.0784" k3="-0.0518"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-FA 50mm f/1.4</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.526</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-30 -->
            <distortion model="poly3" focal="50" k1="-0.00203"/>
            <tca model="poly3" focal="50" br="-0.0000488" cr="0.0001144" vr="1.0005239" bb="0.0001427" cb="-0.0002953" vb="0.9994200"/>
            <vignetting model="pa" focal="50" aperture="1.4" distance="1000" k1="-0.75531" k2="0.64285" k3="-0.26061"/>
            <vignetting model="pa" focal="50" aperture="2" distance="1000" k1="-0.06676" k2="-0.04799" k3="0.02031"/>
            <vignetting model="pa" focal="50" aperture="5.6" distance="1000" k1="-0.15783" k2="0.15089" k3="-0.01524"/>
            <vignetting model="pa" focal="50" aperture="8" distance="1000" k1="-0.1018" k2="-0.00066" k3="0.06612"/>
            <vignetting model="pa" focal="50" aperture="11" distance="1000" k1="-0.00027" k2="-0.25301" k3="0.20985"/>
            <vignetting model="pa" focal="50" aperture="16" distance="1000" k1="-0.13985" k2="0.13367" k3="-0.03586"/>
            <vignetting model="pa" focal="50" aperture="22" distance="1000" k1="-0.05391" k2="-0.06313" k3="0.11027"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-FA 50mm f/1.4</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-1 -->
            <distortion model="ptlens" focal="50" a="0.00533" b="-0.02067" c="0.02125"/>
            <tca model="poly3" focal="50.0" br="0.0000394" vr="1.0001857" bb="0.0000526" vb="0.9993940"/>
            <vignetting model="pa" focal="50" aperture="1.4" distance="1000" k1="-1.4574" k2="1.1617" k3="-0.4518"/>
            <vignetting model="pa" focal="50" aperture="2" distance="1000" k1="-0.0461" k2="-1.2152" k3="0.6719"/>
            <vignetting model="pa" focal="50" aperture="2.8" distance="1000" k1="-0.3162" k2="0.3087" k3="-0.3464"/>
            <vignetting model="pa" focal="50" aperture="4" distance="1000" k1="-0.2434" k2="0.0061" k3="0.0194"/>
            <vignetting model="pa" focal="50" aperture="5.6" distance="1000" k1="-0.3038" k2="0.1823" k3="-0.1025"/>
            <vignetting model="pa" focal="50" aperture="8" distance="1000" k1="-0.3308" k2="0.2728" k3="-0.1756"/>
            <vignetting model="pa" focal="50" aperture="11" distance="1000" k1="-0.3380" k2="0.2932" k3="-0.2021"/>
            <vignetting model="pa" focal="50" aperture="16" distance="1000" k1="-0.3380" k2="0.2678" k3="-0.1838"/>
            <vignetting model="pa" focal="50" aperture="22" distance="1000" k1="-0.3555" k2="0.2764" k3="-0.1692"/>
        </calibration>
    </lens>
    <lens>
        <!-- This is an alias of smc Pentax-DA 21mm f/3.2 AL Limited.
             According to da...@corr.eu.org, they are optically equivalent. -->
        <maker>Pentax</maker>
        <model>HD Pentax-DA 21mm f/3.2 ED AL Limited</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.526</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-5 -->
            <distortion model="poly3" focal="21" k1="-0.01388"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-DA 21mm f/3.2 AL Limited</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.526</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-5 -->
            <distortion model="poly3" focal="21" k1="-0.01388"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-FA 28mm f/2.8 AL</model>
        <mount>Pentax KAF2</mount>
        <!-- Average crop factor of Pentax APS-C cameras -->
        <cropfactor>1.53</cropfactor>
        <calibration>
            <distortion model="poly3" focal="28" k1="-0.00843"/>
            <tca model="poly3" focal="28" br="0.0000578" cr="-0.0001581" vr="1.0005750" bb="-0.0000046" cb="0.0001367" vb="0.9996466"/>
            <vignetting model="pa" focal="28" aperture="11" distance="100" k1="-0.38602" k2="1.0657" k3="-0.86036"/>
            <vignetting model="pa" focal="28" aperture="8" distance="100" k1="-0.41027" k2="0.96832" k3="-0.79405"/>
            <vignetting model="pa" focal="28" aperture="5.6" distance="100" k1="-0.38055" k2="1.06408" k3="-0.92936"/>
            <vignetting model="pa" focal="28" aperture="2.8" distance="100" k1="-0.87866" k2="1.00009" k3="-0.5801"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-FA 28mm f/2.8 AL</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-1 -->
            <distortion model="ptlens" focal="28" a="0.01253" b="-0.03208" c="0.00563"/>
            <tca model="poly3" focal="28" br="-0.0000563" vr="1.0002879" bb="0.0001022" vb="0.9998245"/>
            <vignetting model="pa" focal="28" aperture="2.8" distance="10" k1="-2.0397" k2="2.1920" k3="-0.9456"/>
            <vignetting model="pa" focal="28" aperture="2.8" distance="1000" k1="-2.0397" k2="2.1920" k3="-0.9456"/>
            <vignetting model="pa" focal="28" aperture="4" distance="10" k1="-0.7531" k2="0.1413" k3="0.0144"/>
            <vignetting model="pa" focal="28" aperture="4" distance="1000" k1="-0.7531" k2="0.1413" k3="0.0144"/>
            <vignetting model="pa" focal="28" aperture="5.6" distance="10" k1="-0.7244" k2="0.0516" k3="0.1462"/>
            <vignetting model="pa" focal="28" aperture="5.6" distance="1000" k1="-0.7244" k2="0.0516" k3="0.1462"/>
            <vignetting model="pa" focal="28" aperture="8" distance="10" k1="-0.6642" k2="-0.0844" k3="0.2290"/>
            <vignetting model="pa" focal="28" aperture="8" distance="1000" k1="-0.6642" k2="-0.0844" k3="0.2290"/>
            <vignetting model="pa" focal="28" aperture="11" distance="10" k1="-0.9747" k2="0.6184" k3="-0.1904"/>
            <vignetting model="pa" focal="28" aperture="11" distance="1000" k1="-0.9747" k2="0.6184" k3="-0.1904"/>
            <vignetting model="pa" focal="28" aperture="16" distance="10" k1="-0.9730" k2="0.6071" k3="-0.1809"/>
            <vignetting model="pa" focal="28" aperture="16" distance="1000" k1="-0.9730" k2="0.6071" k3="-0.1809"/>
            <vignetting model="pa" focal="28" aperture="22" distance="10" k1="-0.8601" k2="0.3664" k3="-0.0386"/>
            <vignetting model="pa" focal="28" aperture="22" distance="1000" k1="-0.8601" k2="0.3664" k3="-0.0386"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-DA* 16-50mm f/2.8 ED AL IF SDM</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.526</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-5 II -->
            <distortion model="ptlens" focal="16" a="0.02994" b="-0.08352" c="0.03371"/>
            <distortion model="ptlens" focal="19" a="0.02558" b="-0.07384" c="0.04704"/>
            <distortion model="ptlens" focal="28" a="0.00607" b="-0.01352" c="0.01649"/>
            <distortion model="ptlens" focal="34" a="0" b="0.00495" c="0"/>
            <distortion model="ptlens" focal="50" a="0" b="0.00588" c="0"/>
            <vignetting model="pa" focal="16" aperture="2.8" distance="10" k1="-0.1567" k2="-0.9384" k3="0.4156"/>
            <vignetting model="pa" focal="16" aperture="2.8" distance="1000" k1="-0.1567" k2="-0.9384" k3="0.4156"/>
            <vignetting model="pa" focal="16" aperture="3.5" distance="10" k1="-0.4466" k2="0.3537" k3="-0.4406"/>
            <vignetting model="pa" focal="16" aperture="3.5" distance="1000" k1="-0.4466" k2="0.3537" k3="-0.4406"/>
            <vignetting model="pa" focal="16" aperture="4" distance="10" k1="-0.5021" k2="0.5090" k3="-0.4918"/>
            <vignetting model="pa" focal="16" aperture="4" distance="1000" k1="-0.5021" k2="0.5090" k3="-0.4918"/>
            <vignetting model="pa" focal="16" aperture="4.5" distance="10" k1="-0.5129" k2="0.5057" k3="-0.4417"/>
            <vignetting model="pa" focal="16" aperture="4.5" distance="1000" k1="-0.5129" k2="0.5057" k3="-0.4417"/>
            <vignetting model="pa" focal="16" aperture="5.6" distance="10" k1="-0.4748" k2="0.3967" k3="-0.3273"/>
            <vignetting model="pa" focal="16" aperture="5.6" distance="1000" k1="-0.4748" k2="0.3967" k3="-0.3273"/>
            <vignetting model="pa" focal="16" aperture="6.7" distance="10" k1="-0.4447" k2="0.2538" k3="-0.1859"/>
            <vignetting model="pa" focal="16" aperture="6.7" distance="1000" k1="-0.4447" k2="0.2538" k3="-0.1859"/>
            <vignetting model="pa" focal="16" aperture="8" distance="10" k1="-0.4540" k2="0.1751" k3="-0.0932"/>
            <vignetting model="pa" focal="16" aperture="8" distance="1000" k1="-0.4540" k2="0.1751" k3="-0.0932"/>
            <vignetting model="pa" focal="16" aperture="9.5" distance="10" k1="-0.4308" k2="0.1450" k3="-0.0774"/>
            <vignetting model="pa" focal="16" aperture="9.5" distance="1000" k1="-0.4308" k2="0.1450" k3="-0.0774"/>
            <vignetting model="pa" focal="16" aperture="11" distance="10" k1="-0.4358" k2="0.1504" k3="-0.0787"/>
            <vignetting model="pa" focal="16" aperture="11" distance="1000" k1="-0.4358" k2="0.1504" k3="-0.0787"/>
            <vignetting model="pa" focal="21" aperture="2.8" distance="10" k1="-0.4623" k2="0.4206" k3="-0.3463"/>
            <vignetting model="pa" focal="21" aperture="2.8" distance="1000" k1="-0.4623" k2="0.4206" k3="-0.3463"/>
            <vignetting model="pa" focal="21" aperture="3.5" distance="10" k1="-0.4755" k2="0.4571" k3="-0.3094"/>
            <vignetting model="pa" focal="21" aperture="3.5" distance="1000" k1="-0.4755" k2="0.4571" k3="-0.3094"/>
            <vignetting model="pa" focal="21" aperture="4" distance="10" k1="-0.4441" k2="0.3262" k3="-0.1788"/>
            <vignetting model="pa" focal="21" aperture="4" distance="1000" k1="-0.4441" k2="0.3262" k3="-0.1788"/>
            <vignetting model="pa" focal="21" aperture="4.5" distance="10" k1="-0.4724" k2="0.3480" k3="-0.1808"/>
            <vignetting model="pa" focal="21" aperture="4.5" distance="1000" k1="-0.4724" k2="0.3480" k3="-0.1808"/>
            <vignetting model="pa" focal="21" aperture="5.6" distance="10" k1="-0.4800" k2="0.3717" k3="-0.1971"/>
            <vignetting model="pa" focal="21" aperture="5.6" distance="1000" k1="-0.4800" k2="0.3717" k3="-0.1971"/>
            <vignetting model="pa" focal="21" aperture="6.7" distance="10" k1="-0.4735" k2="0.3730" k3="-0.2007"/>
            <vignetting model="pa" focal="21" aperture="6.7" distance="1000" k1="-0.4735" k2="0.3730" k3="-0.2007"/>
            <vignetting model="pa" focal="21" aperture="8" distance="10" k1="-0.4837" k2="0.3873" k3="-0.2085"/>
            <vignetting model="pa" focal="21" aperture="8" distance="1000" k1="-0.4837" k2="0.3873" k3="-0.2085"/>
            <vignetting model="pa" focal="21" aperture="9.5" distance="10" k1="-0.4879" k2="0.3922" k3="-0.2105"/>
            <vignetting model="pa" focal="21" aperture="9.5" distance="1000" k1="-0.4879" k2="0.3922" k3="-0.2105"/>
            <vignetting model="pa" focal="21" aperture="11" distance="10" k1="-0.4796" k2="0.3733" k3="-0.1987"/>
            <vignetting model="pa" focal="21" aperture="11" distance="1000" k1="-0.4796" k2="0.3733" k3="-0.1987"/>
            <vignetting model="pa" focal="28" aperture="2.8" distance="10" k1="-0.4431" k2="0.5819" k3="-0.5154"/>
            <vignetting model="pa" focal="28" aperture="2.8" distance="1000" k1="-0.4431" k2="0.5819" k3="-0.5154"/>
            <vignetting model="pa" focal="28" aperture="3.5" distance="10" k1="-0.4463" k2="0.6478" k3="-0.5407"/>
            <vignetting model="pa" focal="28" aperture="3.5" distance="1000" k1="-0.4463" k2="0.6478" k3="-0.5407"/>
            <vignetting model="pa" focal="28" aperture="4" distance="10" k1="-0.3905" k2="0.3900" k3="-0.2633"/>
            <vignetting model="pa" focal="28" aperture="4" distance="1000" k1="-0.3905" k2="0.3900" k3="-0.2633"/>
            <vignetting model="pa" focal="28" aperture="4.5" distance="10" k1="-0.3523" k2="0.2523" k3="-0.1422"/>
            <vignetting model="pa" focal="28" aperture="4.5" distance="1000" k1="-0.3523" k2="0.2523" k3="-0.1422"/>
            <vignetting model="pa" focal="28" aperture="5.6" distance="10" k1="-0.3546" k2="0.2350" k3="-0.1180"/>
            <vignetting model="pa" focal="28" aperture="5.6" distance="1000" k1="-0.3546" k2="0.2350" k3="-0.1180"/>
            <vignetting model="pa" focal="28" aperture="6.7" distance="10" k1="-0.3546" k2="0.2302" k3="-0.1114"/>
            <vignetting model="pa" focal="28" aperture="6.7" distance="1000" k1="-0.3546" k2="0.2302" k3="-0.1114"/>
            <vignetting model="pa" focal="28" aperture="8" distance="10" k1="-0.3633" k2="0.2473" k3="-0.1209"/>
            <vignetting model="pa" focal="28" aperture="8" distance="1000" k1="-0.3633" k2="0.2473" k3="-0.1209"/>
            <vignetting model="pa" focal="28" aperture="9.5" distance="10" k1="-0.3661" k2="0.2509" k3="-0.1223"/>
            <vignetting model="pa" focal="28" aperture="9.5" distance="1000" k1="-0.3661" k2="0.2509" k3="-0.1223"/>
            <vignetting model="pa" focal="28" aperture="11" distance="10" k1="-0.3666" k2="0.2498" k3="-0.1207"/>
            <vignetting model="pa" focal="28" aperture="11" distance="1000" k1="-0.3666" k2="0.2498" k3="-0.1207"/>
            <vignetting model="pa" focal="34" aperture="2.8" distance="10" k1="-0.4080" k2="0.6327" k3="-0.6318"/>
            <vignetting model="pa" focal="34" aperture="2.8" distance="1000" k1="-0.4080" k2="0.6327" k3="-0.6318"/>
            <vignetting model="pa" focal="34" aperture="3.5" distance="10" k1="-0.4155" k2="0.6923" k3="-0.6645"/>
            <vignetting model="pa" focal="34" aperture="3.5" distance="1000" k1="-0.4155" k2="0.6923" k3="-0.6645"/>
            <vignetting model="pa" focal="34" aperture="4" distance="10" k1="-0.4089" k2="0.6402" k3="-0.5230"/>
            <vignetting model="pa" focal="34" aperture="4" distance="1000" k1="-0.4089" k2="0.6402" k3="-0.5230"/>
            <vignetting model="pa" focal="34" aperture="4.5" distance="10" k1="-0.3500" k2="0.3962" k3="-0.2882"/>
            <vignetting model="pa" focal="34" aperture="4.5" distance="1000" k1="-0.3500" k2="0.3962" k3="-0.2882"/>
            <vignetting model="pa" focal="34" aperture="5.6" distance="10" k1="-0.3225" k2="0.2645" k3="-0.1622"/>
            <vignetting model="pa" focal="34" aperture="5.6" distance="1000" k1="-0.3225" k2="0.2645" k3="-0.1622"/>
            <vignetting model="pa" focal="34" aperture="6.7" distance="10" k1="-0.3072" k2="0.2018" k3="-0.1037"/>
            <vignetting model="pa" focal="34" aperture="6.7" distance="1000" k1="-0.3072" k2="0.2018" k3="-0.1037"/>
            <vignetting model="pa" focal="34" aperture="8" distance="10" k1="-0.3108" k2="0.2008" k3="-0.0977"/>
            <vignetting model="pa" focal="34" aperture="8" distance="1000" k1="-0.3108" k2="0.2008" k3="-0.0977"/>
            <vignetting model="pa" focal="34" aperture="9.5" distance="10" k1="-0.3171" k2="0.2073" k3="-0.0989"/>
            <vignetting model="pa" focal="34" aperture="9.5" distance="1000" k1="-0.3171" k2="0.2073" k3="-0.0989"/>
            <vignetting model="pa" focal="34" aperture="11" distance="10" k1="-0.3269" k2="0.2291" k3="-0.1142"/>
            <vignetting model="pa" focal="34" aperture="11" distance="1000" k1="-0.3269" k2="0.2291" k3="-0.1142"/>
            <vignetting model="pa" focal="50" aperture="2.8" distance="10" k1="-0.3942" k2="0.5134" k3="-0.5866"/>
            <vignetting model="pa" focal="50" aperture="2.8" distance="1000" k1="-0.3942" k2="0.5134" k3="-0.5866"/>
            <vignetting model="pa" focal="50" aperture="3.5" distance="10" k1="-0.3868" k2="0.5070" k3="-0.5845"/>
            <vignetting model="pa" focal="50" aperture="3.5" distance="1000" k1="-0.3868" k2="0.5070" k3="-0.5845"/>
            <vignetting model="pa" focal="50" aperture="4" distance="10" k1="-0.2986" k2="0.4743" k3="-0.5864"/>
            <vignetting model="pa" focal="50" aperture="4" distance="1000" k1="-0.2986" k2="0.4743" k3="-0.5864"/>
            <vignetting model="pa" focal="50" aperture="4.5" distance="10" k1="-0.3509" k2="0.6401" k3="-0.5701"/>
            <vignetting model="pa" focal="50" aperture="4.5" distance="1000" k1="-0.3509" k2="0.6401" k3="-0.5701"/>
            <vignetting model="pa" focal="50" aperture="5.6" distance="10" k1="-0.3141" k2="0.4269" k3="-0.3366"/>
            <vignetting model="pa" focal="50" aperture="5.6" distance="1000" k1="-0.3141" k2="0.4269" k3="-0.3366"/>
            <vignetting model="pa" focal="50" aperture="6.7" distance="10" k1="-0.2683" k2="0.2352" k3="-0.1556"/>
            <vignetting model="pa" focal="50" aperture="6.7" distance="1000" k1="-0.2683" k2="0.2352" k3="-0.1556"/>
            <vignetting model="pa" focal="50" aperture="8" distance="10" k1="-0.2480" k2="0.1389" k3="-0.0629"/>
            <vignetting model="pa" focal="50" aperture="8" distance="1000" k1="-0.2480" k2="0.1389" k3="-0.0629"/>
            <vignetting model="pa" focal="50" aperture="9.5" distance="10" k1="-0.2537" k2="0.1430" k3="-0.0595"/>
            <vignetting model="pa" focal="50" aperture="9.5" distance="1000" k1="-0.2537" k2="0.1430" k3="-0.0595"/>
            <vignetting model="pa" focal="50" aperture="11" distance="10" k1="-0.2615" k2="0.1624" k3="-0.0720"/>
            <vignetting model="pa" focal="50" aperture="11" distance="1000" k1="-0.2615" k2="0.1624" k3="-0.0720"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-DA Fish-Eye 10-17mm f/3.5-4.5 ED IF</model>
        <mount>Pentax KAF2</mount>
        <type>equisolid</type>
        <cropfactor>1.538</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-7 -->
            <distortion model="ptlens" focal="10" a="-0.03518" b="0.12586" c="-0.09198"/>
            <distortion model="ptlens" focal="11" a="-0.02913" b="0.12685" c="-0.07233"/>
            <distortion model="ptlens" focal="13" a="-0.01146" b="0.05636" c="-0.02116"/>
            <distortion model="ptlens" focal="15" a="-0.00892" b="0.03724" c="-0.02424"/>
            <distortion model="ptlens" focal="17" a="-0.00536" b="0.01752" c="-0.01391"/>
            <tca model="poly3" focal="10" br="0.0000405" vr="1.0004481" bb="-0.0000364" vb="1.0004715"/>
            <tca model="poly3" focal="11" br="0.0000400" vr="1.0004872" bb="-0.0000348" vb="1.0003633"/>
            <tca model="poly3" focal="13" br="0.0000281" vr="1.0005141" bb="-0.0000286" vb="1.0002823"/>
            <tca model="poly3" focal="15" br="0.0000214" vr="1.0005105" bb="-0.0000117" vb="1.0002102"/>
            <tca model="poly3" focal="17" br="0.0000094" vr="1.0005640" bb="-0.0000273" vb="1.0001892"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-A 50mm f/1.7</model>
        <mount>Pentax KA</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-1 -->
            <distortion model="poly3" focal="50" k1="-0.00348"/>
            <tca model="poly3" focal="50" vr="0.9999940" vb="1.0000320"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-A 50mm f/1.7</model>
        <mount>Pentax KA</mount>
        <cropfactor>1.526</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-5 -->
            <distortion model="ptlens" focal="50" a="-0.00487" b="0.01496" c="-0.01497"/>
            <tca model="poly3" focal="50" br="-0.0000066" vr="1.0000443" bb="0.0000030" vb="0.9999706"/>
            <!-- Taken with Pentax K-20 with a different crop factor of 1.538 -->
            <vignetting model="pa" focal="50" aperture="1.7" distance="10" k1="-0.8751" k2="0.7622" k3="-0.3250"/>
            <vignetting model="pa" focal="50" aperture="1.7" distance="1000" k1="-0.8751" k2="0.7622" k3="-0.3250"/>
            <vignetting model="pa" focal="50" aperture="2" distance="10" k1="-0.0567" k2="-0.1913" k3="0.0378"/>
            <vignetting model="pa" focal="50" aperture="2" distance="1000" k1="-0.0567" k2="-0.1913" k3="0.0378"/>
            <vignetting model="pa" focal="50" aperture="2.8" distance="10" k1="-0.1325" k2="0.0376" k3="-0.0060"/>
            <vignetting model="pa" focal="50" aperture="2.8" distance="1000" k1="-0.1325" k2="0.0376" k3="-0.0060"/>
            <vignetting model="pa" focal="50" aperture="4" distance="10" k1="-0.1361" k2="0.0458" k3="-0.0117"/>
            <vignetting model="pa" focal="50" aperture="4" distance="1000" k1="-0.1361" k2="0.0458" k3="-0.0117"/>
            <vignetting model="pa" focal="50" aperture="5.6" distance="10" k1="-0.1449" k2="0.0675" k3="-0.0268"/>
            <vignetting model="pa" focal="50" aperture="5.6" distance="1000" k1="-0.1449" k2="0.0675" k3="-0.0268"/>
            <vignetting model="pa" focal="50" aperture="8" distance="10" k1="-0.1453" k2="0.0706" k3="-0.0297"/>
            <vignetting model="pa" focal="50" aperture="8" distance="1000" k1="-0.1453" k2="0.0706" k3="-0.0297"/>
            <vignetting model="pa" focal="50" aperture="11" distance="10" k1="-0.1455" k2="0.0716" k3="-0.0307"/>
            <vignetting model="pa" focal="50" aperture="11" distance="1000" k1="-0.1455" k2="0.0716" k3="-0.0307"/>
            <vignetting model="pa" focal="50" aperture="16" distance="10" k1="-0.1423" k2="0.0615" k3="-0.0240"/>
            <vignetting model="pa" focal="50" aperture="16" distance="1000" k1="-0.1423" k2="0.0615" k3="-0.0240"/>
            <vignetting model="pa" focal="50" aperture="22" distance="10" k1="-0.1451" k2="0.0701" k3="-0.0294"/>
            <vignetting model="pa" focal="50" aperture="22" distance="1000" k1="-0.1451" k2="0.0701" k3="-0.0294"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-A 28mm 1:2.8</model>
        <mount>Pentax KA</mount>
        <aperture min="2.8" max="22"/>
        <cropfactor>1.538</cropfactor>
        <calibration>
            <!-- Taken with Pentax K20D -->
            <distortion model="ptlens" focal="28" a="0.00207" b="-0.0073" c="-0.00479"/>
            <tca model="poly3" focal="28" br="-0.0000016" vr="1.0004852" bb="0.0000372" vb="0.9997864"/>
            <vignetting model="pa" focal="28" aperture="2.8" distance="10" k1="-1.0219" k2="0.9483" k3="-0.4035"/>
            <vignetting model="pa" focal="28" aperture="2.8" distance="1000" k1="-1.0219" k2="0.9483" k3="-0.4035"/>
            <vignetting model="pa" focal="28" aperture="4" distance="10" k1="-0.2157" k2="-0.3435" k3="0.2363"/>
            <vignetting model="pa" focal="28" aperture="4" distance="1000" k1="-0.2157" k2="-0.3435" k3="0.2363"/>
            <vignetting model="pa" focal="28" aperture="5.6" distance="10" k1="-0.2952" k2="0.0609" k3="-0.0049"/>
            <vignetting model="pa" focal="28" aperture="5.6" distance="1000" k1="-0.2952" k2="0.0609" k3="-0.0049"/>
            <vignetting model="pa" focal="28" aperture="8" distance="10" k1="-0.3061" k2="0.0725" k3="0.0005"/>
            <vignetting model="pa" focal="28" aperture="8" distance="1000" k1="-0.3061" k2="0.0725" k3="0.0005"/>
            <vignetting model="pa" focal="28" aperture="11" distance="10" k1="-0.3185" k2="0.0950" k3="-0.0119"/>
            <vignetting model="pa" focal="28" aperture="11" distance="1000" k1="-0.3185" k2="0.0950" k3="-0.0119"/>
            <vignetting model="pa" focal="28" aperture="16" distance="10" k1="-0.3235" k2="0.1039" k3="-0.0177"/>
            <vignetting model="pa" focal="28" aperture="16" distance="1000" k1="-0.3235" k2="0.1039" k3="-0.0177"/>
            <vignetting model="pa" focal="28" aperture="22" distance="10" k1="-0.3305" k2="0.1152" k3="-0.0231"/>
            <vignetting model="pa" focal="28" aperture="22" distance="1000" k1="-0.3305" k2="0.1152" k3="-0.0231"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-M 28mm 1:3.5</model>
        <mount>Pentax K</mount>
        <cropfactor>1.538</cropfactor>
        <calibration>
            <!-- Taken with Pentax K20D -->
            <distortion model="ptlens" focal="28" a="0.01008" b="-0.03516" c="0.02694"/>
            <tca model="poly3" focal="28" br="-0.0000437" vr="1.0003568" bb="0.0000701" vb="0.9997667"/>
            <vignetting model="pa" focal="28" aperture="3.5" distance="10" k1="-0.8363" k2="0.5255" k3="-0.1650"/>
            <vignetting model="pa" focal="28" aperture="3.5" distance="1000" k1="-0.8363" k2="0.5255" k3="-0.1650"/>
            <vignetting model="pa" focal="28" aperture="5.6" distance="10" k1="-0.2875" k2="0.1126" k3="-0.0632"/>
            <vignetting model="pa" focal="28" aperture="5.6" distance="1000" k1="-0.2875" k2="0.1126" k3="-0.0632"/>
            <vignetting model="pa" focal="28" aperture="8" distance="10" k1="-0.2926" k2="0.1061" k3="-0.0221"/>
            <vignetting model="pa" focal="28" aperture="8" distance="1000" k1="-0.2926" k2="0.1061" k3="-0.0221"/>
            <vignetting model="pa" focal="28" aperture="11" distance="10" k1="-0.3000" k2="0.1243" k3="-0.0334"/>
            <vignetting model="pa" focal="28" aperture="11" distance="1000" k1="-0.3000" k2="0.1243" k3="-0.0334"/>
            <vignetting model="pa" focal="28" aperture="16" distance="10" k1="-0.3024" k2="0.1304" k3="-0.0373"/>
            <vignetting model="pa" focal="28" aperture="16" distance="1000" k1="-0.3024" k2="0.1304" k3="-0.0373"/>
            <vignetting model="pa" focal="28" aperture="22" distance="10" k1="-0.3028" k2="0.1272" k3="-0.0337"/>
            <vignetting model="pa" focal="28" aperture="22" distance="1000" k1="-0.3028" k2="0.1272" k3="-0.0337"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-M 35mm 1:2</model>
        <mount>Pentax K</mount>
        <cropfactor>1.538</cropfactor>
        <calibration>
            <!-- Taken with Pentax K20D -->
            <distortion model="poly3" focal="35" k1="-0.00269"/>
            <tca model="poly3" focal="35" br="0.0000109" vr="1.0003580" bb="0.0000502" vb="0.9997821"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-FA 31mm f/1.8 AL Limited</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.526</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-5 -->
            <distortion model="ptlens" focal="31" a="-0.000413" b="-0.000458" c="-0.007123"/>
            <tca model="poly3" focal="31" br="-0.0000163" vr="1.0002445" bb="0.0000185" vb="0.9999495"/>
            <vignetting model="pa" focal="31" aperture="1.8" distance="10" k1="-1.1124" k2="0.9087" k3="-0.3628"/>
            <vignetting model="pa" focal="31" aperture="1.8" distance="1000" k1="-1.1124" k2="0.9087" k3="-0.3628"/>
            <vignetting model="pa" focal="31" aperture="2" distance="10" k1="-1.1177" k2="0.9163" k3="-0.3658"/>
            <vignetting model="pa" focal="31" aperture="2" distance="1000" k1="-1.1177" k2="0.9163" k3="-0.3658"/>
            <vignetting model="pa" focal="31" aperture="2.2" distance="10" k1="-0.3517" k2="-0.5352" k3="0.4247"/>
            <vignetting model="pa" focal="31" aperture="2.2" distance="1000" k1="-0.3517" k2="-0.5352" k3="0.4247"/>
            <vignetting model="pa" focal="31" aperture="2.5" distance="10" k1="-0.5310" k2="0.1356" k3="-0.0662"/>
            <vignetting model="pa" focal="31" aperture="2.5" distance="1000" k1="-0.5310" k2="0.1356" k3="-0.0662"/>
            <vignetting model="pa" focal="31" aperture="2.8" distance="10" k1="-0.3663" k2="0.0886" k3="-0.0532"/>
            <vignetting model="pa" focal="31" aperture="2.8" distance="1000" k1="-0.3663" k2="0.0886" k3="-0.0532"/>
            <vignetting model="pa" focal="31" aperture="3.2" distance="10" k1="-0.7491" k2="0.8562" k3="-0.4876"/>
            <vignetting model="pa" focal="31" aperture="3.2" distance="1000" k1="-0.7491" k2="0.8562" k3="-0.4876"/>
            <vignetting model="pa" focal="31" aperture="3.5" distance="10" k1="-0.2778" k2="-0.1030" k3="0.1181"/>
            <vignetting model="pa" focal="31" aperture="3.5" distance="1000" k1="-0.2778" k2="-0.1030" k3="0.1181"/>
            <vignetting model="pa" focal="31" aperture="4" distance="10" k1="-0.7966" k2="0.9512" k3="-0.5645"/>
            <vignetting model="pa" focal="31" aperture="4" distance="1000" k1="-0.7966" k2="0.9512" k3="-0.5645"/>
            <vignetting model="pa" focal="31" aperture="4.5" distance="10" k1="-0.2722" k2="-0.1128" k3="0.1237"/>
            <vignetting model="pa" focal="31" aperture="4.5" distance="1000" k1="-0.2722" k2="-0.1128" k3="0.1237"/>
            <vignetting model="pa" focal="31" aperture="5" distance="10" k1="-0.3045" k2="-0.0517" k3="0.0850"/>
            <vignetting model="pa" focal="31" aperture="5" distance="1000" k1="-0.3045" k2="-0.0517" k3="0.0850"/>
            <vignetting model="pa" focal="31" aperture="5.6" distance="10" k1="-0.4972" k2="0.3393" k3="-0.1683"/>
            <vignetting model="pa" focal="31" aperture="5.6" distance="1000" k1="-0.4972" k2="0.3393" k3="-0.1683"/>
            <vignetting model="pa" focal="31" aperture="6.3" distance="10" k1="-0.5530" k2="0.4559" k3="-0.2438"/>
            <vignetting model="pa" focal="31" aperture="6.3" distance="1000" k1="-0.5530" k2="0.4559" k3="-0.2438"/>
            <vignetting model="pa" focal="31" aperture="7.1" distance="10" k1="-0.5660" k2="0.4708" k3="-0.2366"/>
            <vignetting model="pa" focal="31" aperture="7.1" distance="1000" k1="-0.5660" k2="0.4708" k3="-0.2366"/>
            <vignetting model="pa" focal="31" aperture="8" distance="10" k1="-0.2948" k2="-0.0669" k3="0.0932"/>
            <vignetting model="pa" focal="31" aperture="8" distance="1000" k1="-0.2948" k2="-0.0669" k3="0.0932"/>
            <vignetting model="pa" focal="31" aperture="9" distance="10" k1="-0.3206" k2="-0.0077" k3="0.0468"/>
            <vignetting model="pa" focal="31" aperture="9" distance="1000" k1="-0.3206" k2="-0.0077" k3="0.0468"/>
            <vignetting model="pa" focal="31" aperture="10" distance="10" k1="-0.5802" k2="0.5036" k3="-0.2581"/>
            <vignetting model="pa" focal="31" aperture="10" distance="1000" k1="-0.5802" k2="0.5036" k3="-0.2581"/>
            <vignetting model="pa" focal="31" aperture="11" distance="10" k1="-0.2687" k2="-0.1205" k3="0.1297"/>
            <vignetting model="pa" focal="31" aperture="11" distance="1000" k1="-0.2687" k2="-0.1205" k3="0.1297"/>
            <vignetting model="pa" focal="31" aperture="13" distance="10" k1="-0.7903" k2="0.9435" k3="-0.5628"/>
            <vignetting model="pa" focal="31" aperture="13" distance="1000" k1="-0.7903" k2="0.9435" k3="-0.5628"/>
            <vignetting model="pa" focal="31" aperture="14" distance="10" k1="-0.8053" k2="0.9830" k3="-0.5877"/>
            <vignetting model="pa" focal="31" aperture="14" distance="1000" k1="-0.8053" k2="0.9830" k3="-0.5877"/>
            <vignetting model="pa" focal="31" aperture="16" distance="10" k1="-0.4440" k2="0.2324" k3="-0.0922"/>
            <vignetting model="pa" focal="31" aperture="16" distance="1000" k1="-0.4440" k2="0.2324" k3="-0.0922"/>
            <vignetting model="pa" focal="31" aperture="18" distance="10" k1="-0.5060" k2="0.3660" k3="-0.1836"/>
            <vignetting model="pa" focal="31" aperture="18" distance="1000" k1="-0.5060" k2="0.3660" k3="-0.1836"/>
            <vignetting model="pa" focal="31" aperture="20" distance="10" k1="-0.6712" k2="0.7078" k3="-0.4131"/>
            <vignetting model="pa" focal="31" aperture="20" distance="1000" k1="-0.6712" k2="0.7078" k3="-0.4131"/>
            <vignetting model="pa" focal="31" aperture="22" distance="10" k1="-0.6138" k2="0.5839" k3="-0.3204"/>
            <vignetting model="pa" focal="31" aperture="22" distance="1000" k1="-0.6138" k2="0.5839" k3="-0.3204"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-DA 50mm f/1.8</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.526</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-5 II s -->
            <distortion model="poly3" focal="50" k1="-0.00214"/>
            <tca model="poly3" focal="50" vr="0.9999693" vb="1.0000394"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-DA 50mm f/1.8</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-1 -->
            <distortion model="poly3" focal="50" k1="-0.00402783"/>
            <tca model="poly3" focal="50" vr="0.9999" vb="1.00015"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>HD Pentax-DA 20-40mm f/2.8-4 ED Limited DC WR</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.526</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-5 -->
            <distortion model="ptlens" focal="20" a="0.00595" b="-0.02518" c="0.00497"/>
            <distortion model="ptlens" focal="30" a="0" b="-0.00484" c="0"/>
            <distortion model="ptlens" focal="40" a="0" b="-0.00281" c="0"/>
            <tca model="poly3" focal="20" br="0.0000248" vr="1.0001884" bb="-0.0000041" vb="1.0003045"/>
            <tca model="poly3" focal="26" br="0.0000193" vr="1.0002246" bb="0.0000465" vb="1.0001908"/>
            <tca model="poly3" focal="30" br="0.0000226" vr="1.0001588" bb="-0.0000522" vb="1.0002823"/>
            <tca model="poly3" focal="36" br="-0.0000002" vr="1.0001903" bb="-0.0000449" vb="1.0002319"/>
            <tca model="poly3" focal="40" br="0.0000118" vr="1.0001864" bb="-0.0000041" vb="1.0001781"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-M Macro 1:4 50mm</model>
        <mount>Pentax K</mount>
        <cropfactor>1.529</cropfactor>
        <calibration>
            <!-- Taken with Fujifilm X-M1 -->
            <distortion model="poly3" focal="50" k1="-0.00105"/>
            <tca model="poly3" focal="50" vr="0.9999922" vb="1.0000026"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-M Macro 1:4 100mm</model>
        <mount>Pentax K</mount>
        <cropfactor>1.531</cropfactor>
        <calibration>
            <!-- Taken with Pentax K10D -->
            <!-- Really no measurable distortion -->
            <distortion model="poly3" focal="100" k1="0"/>
            <tca model="poly3" focal="100" vr="0.9998701" vb="1.0000849"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-DA L 18-50mm f/4-5.6 DC WR RE</model>
        <mount>Pentax KAF3</mount>
        <cropfactor>1.534</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-S2 -->
            <distortion model="ptlens" focal="18" a="0.00982" b="-0.03805" c="0.01695"/>
            <distortion model="ptlens" focal="24" a="0.00488" b="-0.02037" c="0.01274"/>
            <distortion model="ptlens" focal="34" a="0" b="0.0009" c="0"/>
            <distortion model="ptlens" focal="50" a="0" b="0.00297" c="0"/>
            <tca model="poly3" focal="18" vr="1.0005357" vb="1.0000769"/>
            <tca model="poly3" focal="24" vr="1.0003696" vb="1.0000405"/>
            <tca model="poly3" focal="34" vr="1.0001627" vb="1.0000371"/>
            <tca model="poly3" focal="50" vr="1.0000870" vb="1.0000095"/>
            <!-- Taken with Pentax K20 -->
            <vignetting model="pa" focal="18" aperture="4" distance="10" k1="-0.1711" k2="-0.9527" k3="0.5945"/>
            <vignetting model="pa" focal="18" aperture="4" distance="1000" k1="-0.1711" k2="-0.9527" k3="0.5945"/>
            <vignetting model="pa" focal="18" aperture="5.6" distance="10" k1="-0.0563" k2="-0.5835" k3="0.1701"/>
            <vignetting model="pa" focal="18" aperture="5.6" distance="1000" k1="-0.0563" k2="-0.5835" k3="0.1701"/>
            <vignetting model="pa" focal="18" aperture="8" distance="10" k1="-0.2812" k2="0.2809" k3="-0.3809"/>
            <vignetting model="pa" focal="18" aperture="8" distance="1000" k1="-0.2812" k2="0.2809" k3="-0.3809"/>
            <vignetting model="pa" focal="18" aperture="11" distance="10" k1="-0.3233" k2="0.3157" k3="-0.2672"/>
            <vignetting model="pa" focal="18" aperture="11" distance="1000" k1="-0.3233" k2="0.3157" k3="-0.2672"/>
            <vignetting model="pa" focal="18" aperture="22" distance="10" k1="-0.2513" k2="-0.0017" k3="0.0500"/>
            <vignetting model="pa" focal="18" aperture="22" distance="1000" k1="-0.2513" k2="-0.0017" k3="0.0500"/>
            <vignetting model="pa" focal="24" aperture="4.5" distance="10" k1="-0.0623" k2="-0.9608" k3="0.5561"/>
            <vignetting model="pa" focal="24" aperture="4.5" distance="1000" k1="-0.0623" k2="-0.9608" k3="0.5561"/>
            <vignetting model="pa" focal="24" aperture="5.6" distance="10" k1="-0.1184" k2="-0.1416" k3="-0.0579"/>
            <vignetting model="pa" focal="24" aperture="5.6" distance="1000" k1="-0.1184" k2="-0.1416" k3="-0.0579"/>
            <vignetting model="pa" focal="24" aperture="8" distance="10" k1="-0.2333" k2="0.1738" k3="-0.1239"/>
            <vignetting model="pa" focal="24" aperture="8" distance="1000" k1="-0.2333" k2="0.1738" k3="-0.1239"/>
            <vignetting model="pa" focal="24" aperture="11" distance="10" k1="-0.2046" k2="0.0233" k3="0.0363"/>
            <vignetting model="pa" focal="24" aperture="11" distance="1000" k1="-0.2046" k2="0.0233" k3="0.0363"/>
            <vignetting model="pa" focal="24" aperture="22" distance="10" k1="-0.2095" k2="0.0317" k3="0.0322"/>
            <vignetting model="pa" focal="24" aperture="22" distance="1000" k1="-0.2095" k2="0.0317" k3="0.0322"/>
            <vignetting model="pa" focal="34" aperture="4.5" distance="10" k1="-0.6655" k2="0.4679" k3="-0.1657"/>
            <vignetting model="pa" focal="34" aperture="4.5" distance="1000" k1="-0.6655" k2="0.4679" k3="-0.1657"/>
            <vignetting model="pa" focal="34" aperture="5.6" distance="10" k1="-0.1549" k2="-0.3719" k3="0.2863"/>
            <vignetting model="pa" focal="34" aperture="5.6" distance="1000" k1="-0.1549" k2="-0.3719" k3="0.2863"/>
            <vignetting model="pa" focal="34" aperture="8" distance="10" k1="-0.1223" k2="-0.0198" k3="0.0589"/>
            <vignetting model="pa" focal="34" aperture="8" distance="1000" k1="-0.1223" k2="-0.0198" k3="0.0589"/>
            <vignetting model="pa" focal="34" aperture="11" distance="10" k1="-0.1237" k2="-0.0396" k3="0.0843"/>
            <vignetting model="pa" focal="34" aperture="11" distance="1000" k1="-0.1237" k2="-0.0396" k3="0.0843"/>
            <vignetting model="pa" focal="34" aperture="22" distance="10" k1="-0.1258" k2="-0.0556" k3="0.1032"/>
            <vignetting model="pa" focal="34" aperture="22" distance="1000" k1="-0.1258" k2="-0.0556" k3="0.1032"/>
            <vignetting model="pa" focal="43" aperture="5.6" distance="10" k1="-0.7965" k2="0.7042" k3="-0.2677"/>
            <vignetting model="pa" focal="43" aperture="5.6" distance="1000" k1="-0.7965" k2="0.7042" k3="-0.2677"/>
            <vignetting model="pa" focal="43" aperture="8" distance="10" k1="-0.0475" k2="-0.2120" k3="0.0921"/>
            <vignetting model="pa" focal="43" aperture="8" distance="1000" k1="-0.0475" k2="-0.2120" k3="0.0921"/>
            <vignetting model="pa" focal="43" aperture="11" distance="10" k1="-0.1185" k2="0.0018" k3="0.0462"/>
            <vignetting model="pa" focal="43" aperture="11" distance="1000" k1="-0.1185" k2="0.0018" k3="0.0462"/>
            <vignetting model="pa" focal="43" aperture="22" distance="10" k1="-0.1113" k2="-0.0213" k3="0.0536"/>
            <vignetting model="pa" focal="43" aperture="22" distance="1000" k1="-0.1113" k2="-0.0213" k3="0.0536"/>
            <vignetting model="pa" focal="50" aperture="5.6" distance="10" k1="-0.8485" k2="0.8254" k3="-0.3390"/>
            <vignetting model="pa" focal="50" aperture="5.6" distance="1000" k1="-0.8485" k2="0.8254" k3="-0.3390"/>
            <vignetting model="pa" focal="50" aperture="8" distance="10" k1="-0.0474" k2="-0.5397" k3="0.3555"/>
            <vignetting model="pa" focal="50" aperture="8" distance="1000" k1="-0.0474" k2="-0.5397" k3="0.3555"/>
            <vignetting model="pa" focal="50" aperture="11" distance="10" k1="-0.1252" k2="0.0568" k3="-0.0007"/>
            <vignetting model="pa" focal="50" aperture="11" distance="1000" k1="-0.1252" k2="0.0568" k3="-0.0007"/>
            <vignetting model="pa" focal="50" aperture="22" distance="10" k1="-0.1280" k2="0.0673" k3="-0.0116"/>
            <vignetting model="pa" focal="50" aperture="22" distance="1000" k1="-0.1280" k2="0.0673" k3="-0.0116"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-DA L 18-50mm f/4-5.6 DC WR RE</model>
        <mount>Pentax KAF3</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taqken with Pentax K1; apparently this APS-C lens is being used on these -->
            <distortion model="ptlens" focal="18" a="0.0434503" b="-0.109204" c="0.03667"/>
            <distortion model="ptlens" focal="24" a="0.0244552" b="-0.061887" c="0.0268412"/>
            <distortion model="ptlens" focal="34" a="0" b="0.0062517" c="0"/>
            <distortion model="ptlens" focal="50" a="0" b="0.00861152" c="0"/>
            <tca model="poly3" focal="18" vr="1.0005107" vb="1.0000802"/>
            <tca model="poly3" focal="24" vr="1.0003677" vb="1.0000938"/>
            <tca model="poly3" focal="34" vr="1.0002289" vb="1.0000649"/>
            <tca model="poly3" focal="50" vr="1.0001285" vb="1.0000191"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>HD Pentax-DA 18-50mm f/4-5.6 DC WR RE</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.522</cropfactor>
        <calibration>
            <!-- Taken with K-01 -->
            <distortion model="ptlens" focal="18" a="0.00759" b="-0.02875" c="0.00288"/>
            <distortion model="ptlens" focal="24" a="0.01743" b="-0.06305" c="0.05369"/>
            <distortion model="ptlens" focal="28" a="0.00597" b="-0.02162" c="0.01817"/>
            <distortion model="ptlens" focal="39" a="-0.00398" b="0.01243" c="-0.00553"/>
            <distortion model="ptlens" focal="50" a="-0.0067" b="0.02515" c="-0.02169"/>
            <tca model="poly3" focal="18" vr="1.0006365" vb="1.0000245"/>
            <tca model="poly3" focal="24" vr="1.0004382" vb="1.0000670"/>
            <tca model="poly3" focal="28" vr="1.0003417" vb="1.0000650"/>
            <tca model="poly3" focal="34" vr="1.0002385" vb="1.0000147"/>
            <tca model="poly3" focal="39" vr="1.0001766" vb="0.9999845"/>
            <tca model="poly3" focal="50" vr="1.0001256" vb="0.9999362"/>
            <vignetting model="pa" focal="18" aperture="4" distance="10" k1="-0.2288" k2="-0.8383" k3="0.5234"/>
            <vignetting model="pa" focal="18" aperture="4" distance="1000" k1="-0.2288" k2="-0.8383" k3="0.5234"/>
            <vignetting model="pa" focal="18" aperture="5.6" distance="10" k1="-0.0713" k2="-0.7014" k3="0.3079"/>
            <vignetting model="pa" focal="18" aperture="5.6" distance="1000" k1="-0.0713" k2="-0.7014" k3="0.3079"/>
            <vignetting model="pa" focal="18" aperture="8" distance="10" k1="-0.2615" k2="0.1221" k3="-0.2680"/>
            <vignetting model="pa" focal="18" aperture="8" distance="1000" k1="-0.2615" k2="0.1221" k3="-0.2680"/>
            <vignetting model="pa" focal="18" aperture="11" distance="10" k1="-0.3349" k2="0.3363" k3="-0.3110"/>
            <vignetting model="pa" focal="18" aperture="11" distance="1000" k1="-0.3349" k2="0.3363" k3="-0.3110"/>
            <vignetting model="pa" focal="18" aperture="22" distance="10" k1="-0.2702" k2="0.0679" k3="-0.0405"/>
            <vignetting model="pa" focal="18" aperture="22" distance="1000" k1="-0.2702" k2="0.0679" k3="-0.0405"/>
            <vignetting model="pa" focal="24" aperture="4.5" distance="10" k1="-0.1075" k2="-0.8812" k3="0.4966"/>
            <vignetting model="pa" focal="24" aperture="4.5" distance="1000" k1="-0.1075" k2="-0.8812" k3="0.4966"/>
            <vignetting model="pa" focal="24" aperture="6.3" distance="10" k1="-0.2387" k2="0.2308" k3="-0.2498"/>
            <vignetting model="pa" focal="24" aperture="6.3" distance="1000" k1="-0.2387" k2="0.2308" k3="-0.2498"/>
            <vignetting model="pa" focal="24" aperture="9" distance="10" k1="-0.2415" k2="0.1215" k3="-0.0748"/>
            <vignetting model="pa" focal="24" aperture="9" distance="1000" k1="-0.2415" k2="0.1215" k3="-0.0748"/>
            <vignetting model="pa" focal="24" aperture="13" distance="10" k1="-0.2059" k2="0.0818" k3="-0.0589"/>
            <vignetting model="pa" focal="24" aperture="13" distance="1000" k1="-0.2059" k2="0.0818" k3="-0.0589"/>
            <vignetting model="pa" focal="24" aperture="29" distance="10" k1="-0.2225" k2="0.0706" k3="-0.0367"/>
            <vignetting model="pa" focal="24" aperture="29" distance="1000" k1="-0.2225" k2="0.0706" k3="-0.0367"/>
            <vignetting model="pa" focal="28" aperture="4.5" distance="10" k1="-0.3274" k2="-0.2786" k3="0.1611"/>
            <vignetting model="pa" focal="28" aperture="4.5" distance="1000" k1="-0.3274" k2="-0.2786" k3="0.1611"/>
            <vignetting model="pa" focal="28" aperture="6.3" distance="10" k1="-0.2275" k2="0.2020" k3="-0.1458"/>
            <vignetting model="pa" focal="28" aperture="6.3" distance="1000" k1="-0.2275" k2="0.2020" k3="-0.1458"/>
            <vignetting model="pa" focal="28" aperture="9" distance="10" k1="-0.1796" k2="0.0805" k3="-0.0461"/>
            <vignetting model="pa" focal="28" aperture="9" distance="1000" k1="-0.1796" k2="0.0805" k3="-0.0461"/>
            <vignetting model="pa" focal="28" aperture="13" distance="10" k1="-0.1985" k2="0.0916" k3="-0.0406"/>
            <vignetting model="pa" focal="28" aperture="13" distance="1000" k1="-0.1985" k2="0.0916" k3="-0.0406"/>
            <vignetting model="pa" focal="28" aperture="29" distance="10" k1="-0.1928" k2="0.0815" k3="-0.0349"/>
            <vignetting model="pa" focal="28" aperture="29" distance="1000" k1="-0.1928" k2="0.0815" k3="-0.0349"/>
            <vignetting model="pa" focal="34" aperture="4.5" distance="10" k1="-0.7288" k2="0.6086" k3="-0.2772"/>
            <vignetting model="pa" focal="34" aperture="4.5" distance="1000" k1="-0.7288" k2="0.6086" k3="-0.2772"/>
            <vignetting model="pa" focal="34" aperture="6.3" distance="10" k1="-0.0908" k2="-0.1276" k3="0.0099"/>
            <vignetting model="pa" focal="34" aperture="6.3" distance="1000" k1="-0.0908" k2="-0.1276" k3="0.0099"/>
            <vignetting model="pa" focal="34" aperture="9" distance="10" k1="-0.1748" k2="0.1496" k3="-0.1001"/>
            <vignetting model="pa" focal="34" aperture="9" distance="1000" k1="-0.1748" k2="0.1496" k3="-0.1001"/>
            <vignetting model="pa" focal="34" aperture="13" distance="10" k1="-0.1586" k2="0.0908" k3="-0.0469"/>
            <vignetting model="pa" focal="34" aperture="13" distance="1000" k1="-0.1586" k2="0.0908" k3="-0.0469"/>
            <vignetting model="pa" focal="34" aperture="29" distance="10" k1="-0.1675" k2="0.1070" k3="-0.0561"/>
            <vignetting model="pa" focal="34" aperture="29" distance="1000" k1="-0.1675" k2="0.1070" k3="-0.0561"/>
            <vignetting model="pa" focal="39" aperture="4.5" distance="10" k1="-0.8357" k2="0.7791" k3="-0.3391"/>
            <vignetting model="pa" focal="39" aperture="4.5" distance="1000" k1="-0.8357" k2="0.7791" k3="-0.3391"/>
            <vignetting model="pa" focal="39" aperture="6.3" distance="10" k1="-0.0552" k2="-0.5400" k3="0.3269"/>
            <vignetting model="pa" focal="39" aperture="6.3" distance="1000" k1="-0.0552" k2="-0.5400" k3="0.3269"/>
            <vignetting model="pa" focal="39" aperture="9" distance="10" k1="-0.1535" k2="0.1276" k3="-0.1080"/>
            <vignetting model="pa" focal="39" aperture="9" distance="1000" k1="-0.1535" k2="0.1276" k3="-0.1080"/>
            <vignetting model="pa" focal="39" aperture="13" distance="10" k1="-0.1557" k2="0.1146" k3="-0.0672"/>
            <vignetting model="pa" focal="39" aperture="13" distance="1000" k1="-0.1557" k2="0.1146" k3="-0.0672"/>
            <vignetting model="pa" focal="39" aperture="29" distance="10" k1="-0.1298" k2="0.0037" k3="0.0171"/>
            <vignetting model="pa" focal="39" aperture="29" distance="1000" k1="-0.1298" k2="0.0037" k3="0.0171"/>
            <vignetting model="pa" focal="50" aperture="5.6" distance="10" k1="-0.9176" k2="0.9620" k3="-0.4457"/>
            <vignetting model="pa" focal="50" aperture="5.6" distance="1000" k1="-0.9176" k2="0.9620" k3="-0.4457"/>
            <vignetting model="pa" focal="50" aperture="8" distance="10" k1="-0.0159" k2="-0.4878" k3="0.2492"/>
            <vignetting model="pa" focal="50" aperture="8" distance="1000" k1="-0.0159" k2="-0.4878" k3="0.2492"/>
            <vignetting model="pa" focal="50" aperture="11" distance="10" k1="-0.1623" k2="0.1730" k3="-0.1327"/>
            <vignetting model="pa" focal="50" aperture="11" distance="1000" k1="-0.1623" k2="0.1730" k3="-0.1327"/>
            <vignetting model="pa" focal="50" aperture="16" distance="10" k1="-0.1510" k2="0.1024" k3="-0.0545"/>
            <vignetting model="pa" focal="50" aperture="16" distance="1000" k1="-0.1510" k2="0.1024" k3="-0.0545"/>
            <vignetting model="pa" focal="50" aperture="32" distance="10" k1="-0.1348" k2="0.0672" k3="-0.0349"/>
            <vignetting model="pa" focal="50" aperture="32" distance="1000" k1="-0.1348" k2="0.0672" k3="-0.0349"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>HD Pentax-D FA 150-450mm f/4.5-5.6 ED DC AW</model>
        <mount>Pentax KAF3</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-1 -->
            <distortion model="poly3" focal="150" k1="0.00772173"/>
            <distortion model="poly3" focal="250" k1="0.00799477"/>
            <distortion model="poly3" focal="450" k1="0.00547256"/>
            <tca model="poly3" focal="150" vr="1.0002226" vb="1.0000038"/>
            <tca model="poly3" focal="250" vr="1.0000519" vb="0.9999295"/>
            <tca model="poly3" focal="450" vr="0.9998498" vb="0.9997845"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-DA L 50-200mm f/4-5.6 ED WR</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.534</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-S2 -->
            <distortion model="poly3" focal="50" k1="-0.00627"/>
            <distortion model="poly3" focal="57.5" k1="-0.00403"/>
            <distortion model="poly3" focal="80" k1="0.0038"/>
            <distortion model="poly3" focal="105" k1="0.00915"/>
            <distortion model="poly3" focal="137.5" k1="0.00709"/>
            <distortion model="poly3" focal="200" k1="0.00746"/>
            <tca model="poly3" focal="50" vr="0.9999539" vb="1.0001903"/>
            <tca model="poly3" focal="57.5" vr="0.9999462" vb="1.0001701"/>
            <tca model="poly3" focal="80" vr="0.9998231" vb="1.0001614"/>
            <tca model="poly3" focal="105" vr="0.9998754" vb="1.0000401"/>
            <tca model="poly3" focal="137.5" vr="0.9998983" vb="0.9999943"/>
            <tca model="poly3" focal="200" vr="0.9999243" vb="0.9999551"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-DA L 50-200mm f/4-5.6 ED WR</model>
        <mount>Pentax KAF</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-1 -->
            <distortion model="poly3" focal="50" k1="-0.0115879"/>
            <distortion model="poly3" focal="67.5" k1="0.0052576"/>
            <distortion model="poly3" focal="80" k1="0.0137754"/>
            <distortion model="poly3" focal="200" k1="0.0202866"/>
            <tca model="poly3" focal="50" vr="1.0000914" vb="1.0000996"/>
            <tca model="poly3" focal="67.5" vr="0.9999968" vb="1.0001589"/>
            <tca model="poly3" focal="80" vr="0.9999374" vb="1.0002043"/>
            <tca model="poly3" focal="200" vr="0.9998614" vb="0.9999141"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-DA 17-70mm f/4 AL [IF] SDM</model>
        <mount>Pentax KAF2</mount>
        <!-- Average crop factor of Pentax APS-C cameras -->
        <cropfactor>1.53</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="17" a="-0.01067" b="0.03945" c="-0.07039"/>
            <distortion model="ptlens" focal="19" a="-0.00170" b="0.01164" c="-0.02842"/>
            <distortion model="ptlens" focal="23" a="-0.01072" b="0.03889" c="-0.04282"/>
            <distortion model="ptlens" focal="28" a="-0.0133" b="0.05266" c="-0.05293"/>
            <distortion model="ptlens" focal="33" a="0.00167" b="0.00049" c="0.00827"/>
            <distortion model="ptlens" focal="39" a="-0.00545" b="0.02304" c="-0.01654"/>
            <distortion model="ptlens" focal="48" a="-0.00577" b="0.02136" c="-0.00938"/>
            <distortion model="ptlens" focal="58" a="-0.00833" b="0.0294" c="-0.01728"/>
            <distortion model="ptlens" focal="70" a="0.00129" b="-0.00754" c="0.02604"/>
        </calibration>
    </lens>
    <lens>
        <!-- This lens is actually from Asahi.  But
             https://sourceforge.net/p/lensfun/features/77/ suggests to call it
             a Pentax lens. -->
        <maker>Pentax</maker>
        <model>Super-Takumar 55mm f/1.8</model>
        <mount>M42</mount>
        <cropfactor>1.523</cropfactor>
        <calibration>
            <!-- Taken with Sony SLT-A58 -->
            <distortion model="ptlens" focal="55" a="0" b="-0.00012" c="0"/>
            <tca model="poly3" focal="55" br="-0.0000267" vr="1.0000445" bb="0.0000021" vb="0.9999832"/>
            <vignetting model="pa" focal="55" aperture="1.8" distance="10" k1="-0.6803" k2="0.5250" k3="-0.2020"/>
            <vignetting model="pa" focal="55" aperture="1.8" distance="1000" k1="-0.6803" k2="0.5250" k3="-0.2020"/>
            <vignetting model="pa" focal="55" aperture="2.8" distance="10" k1="-0.2143" k2="0.1688" k3="-0.0836"/>
            <vignetting model="pa" focal="55" aperture="2.8" distance="1000" k1="-0.2143" k2="0.1688" k3="-0.0836"/>
            <vignetting model="pa" focal="55" aperture="4" distance="10" k1="-0.2404" k2="0.2739" k3="-0.1533"/>
            <vignetting model="pa" focal="55" aperture="4" distance="1000" k1="-0.2404" k2="0.2739" k3="-0.1533"/>
            <vignetting model="pa" focal="55" aperture="5.6" distance="10" k1="-0.1623" k2="0.0872" k3="-0.0380"/>
            <vignetting model="pa" focal="55" aperture="5.6" distance="1000" k1="-0.1623" k2="0.0872" k3="-0.0380"/>
            <vignetting model="pa" focal="55" aperture="8" distance="10" k1="-0.0924" k2="-0.1354" k3="0.1294"/>
            <vignetting model="pa" focal="55" aperture="8" distance="1000" k1="-0.0924" k2="-0.1354" k3="0.1294"/>
            <vignetting model="pa" focal="55" aperture="11" distance="10" k1="-0.1800" k2="0.0518" k3="0.0326"/>
            <vignetting model="pa" focal="55" aperture="11" distance="1000" k1="-0.1800" k2="0.0518" k3="0.0326"/>
            <vignetting model="pa" focal="55" aperture="16" distance="10" k1="-0.2170" k2="0.1550" k3="-0.0377"/>
            <vignetting model="pa" focal="55" aperture="16" distance="1000" k1="-0.2170" k2="0.1550" k3="-0.0377"/>
        </calibration>
    </lens>
    <lens>
        <!-- This lens is actually from Asahi.  But
             https://sourceforge.net/p/lensfun/features/77/ suggests to call it
             a Pentax lens. -->
        <maker>Pentax</maker>
        <model>Super-Takumar 50mm f/1.4</model>
        <mount>M42</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taken with Sony A7R II -->
            <distortion model="poly3" focal="50" k1="-0.0055"/>
            <tca model="poly3" focal="50" vr="1.0001502" vb="0.9998892"/>
        </calibration>
    </lens>
    <lens>
        <!-- This lens is optically identical to the Tamron SP 24-70mm f/2.8 Di
             VC USD. -->
        <maker>Pentax</maker>
        <model>HD Pentax-D FA 24-70mm f/2.8 ED SDM WR</model>
        <mount>Pentax KAF3</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="24" a="0.03519" b="-0.10395" c="0.06092"/>
            <distortion model="ptlens" focal="35" a="0.01436" b="-0.0404" c="0.03983"/>
            <distortion model="ptlens" focal="50" a="0.01112" b="-0.02223" c="0.02177"/>
            <distortion model="ptlens" focal="70" a="0.00625" b="-0.00862" c="0.00987"/>
            <tca model="poly3" focal="24" br="-0.0000913" vr="1.0008446" bb="0.0000181" vb="0.9998653"/>
            <tca model="poly3" focal="35" br="0.0000457" vr="1.0004519" bb="-0.0000735" vb="0.9998598"/>
            <tca model="poly3" focal="50" br="0.0000118" vr="1.0000938" bb="-0.0000862" vb="0.9998401"/>
            <tca model="poly3" focal="70" br="-0.0000161" vr="0.9997567" bb="-0.0000354" vb="0.9997991"/>
            <vignetting model="pa" focal="24" aperture="2.8" distance="10" k1="-0.3189" k2="-0.8558" k3="0.4745"/>
            <vignetting model="pa" focal="24" aperture="2.8" distance="1000" k1="-0.3189" k2="-0.8558" k3="0.4745"/>
            <vignetting model="pa" focal="24" aperture="4" distance="10" k1="-0.5825" k2="0.2600" k3="-0.2299"/>
            <vignetting model="pa" focal="24" aperture="4" distance="1000" k1="-0.5825" k2="0.2600" k3="-0.2299"/>
            <vignetting model="pa" focal="24" aperture="5.6" distance="10" k1="-0.5413" k2="0.0251" k3="0.0572"/>
            <vignetting model="pa" focal="24" aperture="5.6" distance="1000" k1="-0.5413" k2="0.0251" k3="0.0572"/>
            <vignetting model="pa" focal="24" aperture="8" distance="10" k1="-0.5513" k2="0.0446" k3="0.0463"/>
            <vignetting model="pa" focal="24" aperture="8" distance="1000" k1="-0.5513" k2="0.0446" k3="0.0463"/>
            <vignetting model="pa" focal="24" aperture="22" distance="10" k1="-0.5677" k2="0.0827" k3="0.0220"/>
            <vignetting model="pa" focal="24" aperture="22" distance="1000" k1="-0.5677" k2="0.0827" k3="0.0220"/>
            <vignetting model="pa" focal="35" aperture="2.8" distance="10" k1="-0.4638" k2="0.1432" k3="-0.2915"/>
            <vignetting model="pa" focal="35" aperture="2.8" distance="1000" k1="-0.4638" k2="0.1432" k3="-0.2915"/>
            <vignetting model="pa" focal="35" aperture="4" distance="10" k1="-0.5149" k2="0.5116" k3="-0.4389"/>
            <vignetting model="pa" focal="35" aperture="4" distance="1000" k1="-0.5149" k2="0.5116" k3="-0.4389"/>
            <vignetting model="pa" focal="35" aperture="5.6" distance="10" k1="-0.3905" k2="0.0047" k3="0.0307"/>
            <vignetting model="pa" focal="35" aperture="5.6" distance="1000" k1="-0.3905" k2="0.0047" k3="0.0307"/>
            <vignetting model="pa" focal="35" aperture="8" distance="10" k1="-0.3848" k2="-0.0300" k3="0.0657"/>
            <vignetting model="pa" focal="35" aperture="8" distance="1000" k1="-0.3848" k2="-0.0300" k3="0.0657"/>
            <vignetting model="pa" focal="35" aperture="22" distance="10" k1="-0.4007" k2="0.0042" k3="0.0440"/>
            <vignetting model="pa" focal="35" aperture="22" distance="1000" k1="-0.4007" k2="0.0042" k3="0.0440"/>
            <vignetting model="pa" focal="50" aperture="2.8" distance="10" k1="-0.4956" k2="0.2554" k3="-0.3770"/>
            <vignetting model="pa" focal="50" aperture="2.8" distance="1000" k1="-0.4956" k2="0.2554" k3="-0.3770"/>
            <vignetting model="pa" focal="50" aperture="5.6" distance="10" k1="-0.3485" k2="0.1887" k3="-0.1457"/>
            <vignetting model="pa" focal="50" aperture="5.6" distance="1000" k1="-0.3485" k2="0.1887" k3="-0.1457"/>
            <vignetting model="pa" focal="50" aperture="8" distance="10" k1="-0.2981" k2="-0.0200" k3="0.0448"/>
            <vignetting model="pa" focal="50" aperture="8" distance="1000" k1="-0.2981" k2="-0.0200" k3="0.0448"/>
            <vignetting model="pa" focal="50" aperture="22" distance="10" k1="-0.3145" k2="0.0156" k3="0.0210"/>
            <vignetting model="pa" focal="50" aperture="22" distance="1000" k1="-0.3145" k2="0.0156" k3="0.0210"/>
            <vignetting model="pa" focal="58" aperture="2.8" distance="10" k1="-0.3710" k2="-0.3033" k3="-0.0247"/>
            <vignetting model="pa" focal="58" aperture="2.8" distance="1000" k1="-0.3710" k2="-0.3033" k3="-0.0247"/>
            <vignetting model="pa" focal="58" aperture="4" distance="10" k1="-0.3722" k2="0.5539" k3="-0.6981"/>
            <vignetting model="pa" focal="58" aperture="4" distance="1000" k1="-0.3722" k2="0.5539" k3="-0.6981"/>
            <vignetting model="pa" focal="58" aperture="5.6" distance="10" k1="-0.4638" k2="0.7390" k3="-0.6869"/>
            <vignetting model="pa" focal="58" aperture="5.6" distance="1000" k1="-0.4638" k2="0.7390" k3="-0.6869"/>
            <vignetting model="pa" focal="58" aperture="8" distance="10" k1="-0.3864" k2="0.3712" k3="-0.2976"/>
            <vignetting model="pa" focal="58" aperture="8" distance="1000" k1="-0.3864" k2="0.3712" k3="-0.2976"/>
            <vignetting model="pa" focal="58" aperture="22" distance="10" k1="-0.3146" k2="0.0555" k3="-0.0042"/>
            <vignetting model="pa" focal="58" aperture="22" distance="1000" k1="-0.3146" k2="0.0555" k3="-0.0042"/>
            <vignetting model="pa" focal="70" aperture="2.8" distance="10" k1="-0.4606" k2="-0.1618" k3="-0.0450"/>
            <vignetting model="pa" focal="70" aperture="2.8" distance="1000" k1="-0.4606" k2="-0.1618" k3="-0.0450"/>
            <vignetting model="pa" focal="70" aperture="4" distance="10" k1="-0.2836" k2="0.3371" k3="-0.5462"/>
            <vignetting model="pa" focal="70" aperture="4" distance="1000" k1="-0.2836" k2="0.3371" k3="-0.5462"/>
            <vignetting model="pa" focal="70" aperture="5.6" distance="10" k1="-0.4034" k2="0.6102" k3="-0.5750"/>
            <vignetting model="pa" focal="70" aperture="5.6" distance="1000" k1="-0.4034" k2="0.6102" k3="-0.5750"/>
            <vignetting model="pa" focal="70" aperture="8" distance="10" k1="-0.3144" k2="0.2099" k3="-0.1629"/>
            <vignetting model="pa" focal="70" aperture="8" distance="1000" k1="-0.3144" k2="0.2099" k3="-0.1629"/>
            <vignetting model="pa" focal="70" aperture="22" distance="10" k1="-0.2782" k2="0.0390" k3="-0.0031"/>
            <vignetting model="pa" focal="70" aperture="22" distance="1000" k1="-0.2782" k2="0.0390" k3="-0.0031"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-DA 35mm f/2.8 Macro Limited</model>
        <mount>Pentax KAF3</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-1 -->
            <distortion model="ptlens" focal="35" a="0.01494" b="-0.04536" c="0.03628"/>
            <tca model="poly3" focal="35" br="-0.0002488" vr="1.0004726" bb="0.0004055" vb="0.9996175"/>
            <vignetting model="pa" focal="35" aperture="2.8" distance="10" k1="-0.5990" k2="-0.2392" k3="0.1103"/>
            <vignetting model="pa" focal="35" aperture="2.8" distance="1000" k1="-0.5990" k2="-0.2392" k3="0.1103"/>
            <vignetting model="pa" focal="35" aperture="4" distance="10" k1="-0.0239" k2="-0.5539" k3="-0.0118"/>
            <vignetting model="pa" focal="35" aperture="4" distance="1000" k1="-0.0239" k2="-0.5539" k3="-0.0118"/>
            <vignetting model="pa" focal="35" aperture="5.6" distance="10" k1="-0.2993" k2="0.4647" k3="-0.7017"/>
            <vignetting model="pa" focal="35" aperture="5.6" distance="1000" k1="-0.2993" k2="0.4647" k3="-0.7017"/>
            <vignetting model="pa" focal="35" aperture="8" distance="10" k1="-0.4227" k2="0.7528" k3="-0.7591"/>
            <vignetting model="pa" focal="35" aperture="8" distance="1000" k1="-0.4227" k2="0.7528" k3="-0.7591"/>
            <vignetting model="pa" focal="35" aperture="11" distance="10" k1="-0.4161" k2="0.6735" k3="-0.6253"/>
            <vignetting model="pa" focal="35" aperture="11" distance="1000" k1="-0.4161" k2="0.6735" k3="-0.6253"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>Pentax SMC Takumar 50mm f/1.4</model>
        <mount>M42</mount>
        <mount>Sony E</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taken with Sony ILCE-7RM2 (α7R II) -->
            <distortion model="poly3" focal="50" k1="-0.00355"/>
            <tca model="poly3" focal="50" br="-0.0001747" vr="1.0004813" bb="0.0003380" vb="0.9992411"/>
            <vignetting model="pa" focal="50" aperture="1.4" distance="10" k1="-1.6131" k2="1.4080" k3="-0.5884"/>
            <vignetting model="pa" focal="50" aperture="1.4" distance="1000" k1="-1.6131" k2="1.4080" k3="-0.5884"/>
            <vignetting model="pa" focal="50" aperture="2" distance="10" k1="0.1586" k2="-1.8367" k3="1.0393"/>
            <vignetting model="pa" focal="50" aperture="2" distance="1000" k1="0.1586" k2="-1.8367" k3="1.0393"/>
            <vignetting model="pa" focal="50" aperture="2.8" distance="10" k1="-0.1789" k2="0.1681" k3="-0.4441"/>
            <vignetting model="pa" focal="50" aperture="2.8" distance="1000" k1="-0.1789" k2="0.1681" k3="-0.4441"/>
            <vignetting model="pa" focal="50" aperture="4" distance="10" k1="-0.2742" k2="0.2474" k3="-0.1873"/>
            <vignetting model="pa" focal="50" aperture="4" distance="1000" k1="-0.2742" k2="0.2474" k3="-0.1873"/>
            <vignetting model="pa" focal="50" aperture="16" distance="10" k1="-0.2816" k2="0.1855" k3="-0.1058"/>
            <vignetting model="pa" focal="50" aperture="16" distance="1000" k1="-0.2816" k2="0.1855" k3="-0.1058"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-FA 28-70mm f/4 AL</model>
        <mount>Pentax KAF</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-1 -->
            <distortion model="ptlens" focal="28" a="0" b="-0.0159544" c="0"/>
            <distortion model="ptlens" focal="37" a="0" b="-0.00482476" c="0"/>
            <distortion model="ptlens" focal="50" a="0" b="0.00250797" c="0"/>
            <distortion model="ptlens" focal="70" a="0" b="0.00605134" c="0"/>
            <tca model="poly3" focal="28" vr="1.0004675" vb="0.9999703"/>
            <tca model="poly3" focal="37" vr="1.0002036" vb="1.0000212"/>
            <tca model="poly3" focal="50" vr="1.0000128" vb="1.0000486"/>
            <tca model="poly3" focal="70" vr="0.9999436" vb="1.0001435"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-A 50mm f/1.4</model>
        <mount>Pentax KA</mount>
        <cropfactor>1.522</cropfactor>
        <calibration>
            <!-- Taken with K-01 -->
            <distortion model="ptlens" focal="50" a="-0.00741" b="0.02093" c="-0.02239"/>
            <tca model="poly3" focal="50" br="-0.0000127" vr="1.0002725" bb="0.0000319" vb="0.9997110"/>
            <vignetting model="pa" focal="50" aperture="1.4" distance="10" k1="-0.7760" k2="0.5565" k3="-0.2156"/>
            <vignetting model="pa" focal="50" aperture="1.4" distance="1000" k1="-0.7760" k2="0.5565" k3="-0.2156"/>
            <vignetting model="pa" focal="50" aperture="1.6" distance="10" k1="-0.0467" k2="-0.3017" k3="0.0988"/>
            <vignetting model="pa" focal="50" aperture="1.6" distance="1000" k1="-0.0467" k2="-0.3017" k3="0.0988"/>
            <vignetting model="pa" focal="50" aperture="1.8" distance="10" k1="-0.1500" k2="0.1371" k3="-0.1749"/>
            <vignetting model="pa" focal="50" aperture="1.8" distance="1000" k1="-0.1500" k2="0.1371" k3="-0.1749"/>
            <vignetting model="pa" focal="50" aperture="2" distance="10" k1="-0.1824" k2="0.2237" k3="-0.1834"/>
            <vignetting model="pa" focal="50" aperture="2" distance="1000" k1="-0.1824" k2="0.2237" k3="-0.1834"/>
            <vignetting model="pa" focal="50" aperture="2.8" distance="10" k1="-0.1506" k2="0.1157" k3="-0.0752"/>
            <vignetting model="pa" focal="50" aperture="2.8" distance="1000" k1="-0.1506" k2="0.1157" k3="-0.0752"/>
            <vignetting model="pa" focal="50" aperture="4" distance="10" k1="-0.1662" k2="0.1458" k3="-0.0863"/>
            <vignetting model="pa" focal="50" aperture="4" distance="1000" k1="-0.1662" k2="0.1458" k3="-0.0863"/>
            <vignetting model="pa" focal="50" aperture="5.6" distance="10" k1="-0.1891" k2="0.1999" k3="-0.1187"/>
            <vignetting model="pa" focal="50" aperture="5.6" distance="1000" k1="-0.1891" k2="0.1999" k3="-0.1187"/>
            <vignetting model="pa" focal="50" aperture="8" distance="10" k1="-0.2013" k2="0.2170" k3="-0.1260"/>
            <vignetting model="pa" focal="50" aperture="8" distance="1000" k1="-0.2013" k2="0.2170" k3="-0.1260"/>
            <vignetting model="pa" focal="50" aperture="11" distance="10" k1="-0.2023" k2="0.2091" k3="-0.1142"/>
            <vignetting model="pa" focal="50" aperture="11" distance="1000" k1="-0.2023" k2="0.2091" k3="-0.1142"/>
            <vignetting model="pa" focal="50" aperture="16" distance="10" k1="-0.2031" k2="0.2031" k3="-0.1123"/>
            <vignetting model="pa" focal="50" aperture="16" distance="1000" k1="-0.2031" k2="0.2031" k3="-0.1123"/>
            <vignetting model="pa" focal="50" aperture="22" distance="10" k1="-0.2138" k2="0.2232" k3="-0.1273"/>
            <vignetting model="pa" focal="50" aperture="22" distance="1000" k1="-0.2138" k2="0.2232" k3="-0.1273"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc Pentax-F 28mm f/2.8</model>
        <mount>Pentax KAF</mount>
        <cropfactor>1.522</cropfactor>
        <calibration>
            <!-- Taken with K-01 -->
            <distortion model="ptlens" focal="28" a="0.00264" b="-0.01024" c="0.00489"/>
            <tca model="poly3" focal="28" br="0.0000072" vr="1.0003561" bb="0.0000565" vb="0.9998573"/>
            <vignetting model="pa" focal="28" aperture="2.8" distance="10" k1="-1.1033" k2="1.0965" k3="-0.4898"/>
            <vignetting model="pa" focal="28" aperture="2.8" distance="1000" k1="-1.1033" k2="1.0965" k3="-0.4898"/>
            <vignetting model="pa" focal="28" aperture="4" distance="10" k1="-0.2855" k2="-0.0275" k3="0.0059"/>
            <vignetting model="pa" focal="28" aperture="4" distance="1000" k1="-0.2855" k2="-0.0275" k3="0.0059"/>
            <vignetting model="pa" focal="28" aperture="5.6" distance="10" k1="-0.3413" k2="0.1215" k3="-0.0309"/>
            <vignetting model="pa" focal="28" aperture="5.6" distance="1000" k1="-0.3413" k2="0.1215" k3="-0.0309"/>
            <vignetting model="pa" focal="28" aperture="8" distance="10" k1="-0.3427" k2="0.1144" k3="-0.0240"/>
            <vignetting model="pa" focal="28" aperture="8" distance="1000" k1="-0.3427" k2="0.1144" k3="-0.0240"/>
            <vignetting model="pa" focal="28" aperture="11" distance="10" k1="-0.3492" k2="0.1265" k3="-0.0309"/>
            <vignetting model="pa" focal="28" aperture="11" distance="1000" k1="-0.3492" k2="0.1265" k3="-0.0309"/>
            <vignetting model="pa" focal="28" aperture="16" distance="10" k1="-0.3597" k2="0.1541" k3="-0.0477"/>
            <vignetting model="pa" focal="28" aperture="16" distance="1000" k1="-0.3597" k2="0.1541" k3="-0.0477"/>
            <vignetting model="pa" focal="28" aperture="22" distance="10" k1="-0.3630" k2="0.1491" k3="-0.0443"/>
            <vignetting model="pa" focal="28" aperture="22" distance="1000" k1="-0.3630" k2="0.1491" k3="-0.0443"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc PENTAX DA* 60-250mm f/4 [IF] SDM</model>
        <model lang="en">smc PENTAX DA* 60-250mm f/4 IF SDM</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.534</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-S2 -->
            <distortion model="ptlens" focal="60" a="-0.00294" b="0.00889" c="-0.01651"/>
            <distortion model="ptlens" focal="88" a="0.00211" b="-0.00301" c="-0.00178"/>
            <distortion model="ptlens" focal="140" a="0.006" b="-0.02284" c="0.03739"/>
            <distortion model="ptlens" focal="200" a="-0.0243" b="0.09971" c="-0.12575"/>
            <distortion model="ptlens" focal="250" a="0.00399" b="-0.02097" c="0.04071"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>HD Pentax-DA 55-300mm f/4.5-6.3 ED PLM WR RE</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.534</cropfactor>
        <calibration>
            <!-- Taken with Pentax KP -->
            <distortion model="ptlens" focal="55" a="-0.00165" b="-0.00295" c="-0.00668"/>
            <distortion model="ptlens" focal="70" a="0.00698" b="-0.02477" c="0.02391"/>
            <distortion model="ptlens" focal="98" a="0.01232" b="-0.03764" c="0.04504"/>
            <distortion model="ptlens" focal="210" a="-0.00212" b="0.01149" c="-0.00132"/>
            <distortion model="ptlens" focal="300" a="-0.0025" b="0.01132" c="-0.00167"/>
            <tca model="poly3" focal="55" vr="1.0005523" vb="1.0001512"/>
            <tca model="poly3" focal="70" vr="1.0002978" vb="1.0000951"/>
            <tca model="poly3" focal="98" vr="1.0000377" vb="1.0000148"/>
            <tca model="poly3" focal="210" vr="0.9999084" vb="0.9999434"/>
            <tca model="poly3" focal="300" vr="0.9999354" vb="0.9999179"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc PENTAX-F 35-80mm f/4-5.6</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.531</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="35.0" a="-0.003" b="0.003" c="-0.009"/>
            <distortion model="ptlens" focal="40.0" a="-0.001" b="-0.002" c="-0.0"/>
            <distortion model="ptlens" focal="53.0" a="0.005" b="-0.018" c="0.021"/>
            <distortion model="ptlens" focal="60.0" a="-0.002" b="0.006" c="0.001"/>
            <distortion model="ptlens" focal="68.0" a="0.007" b="-0.028" c="0.041"/>
            <distortion model="ptlens" focal="80.0" a="-0.007" b="0.029" c="-0.032"/>
            <tca model="poly3" focal="35.0" br="-0.0000889" vr="1.0005049" bb="0.0000380" vb="0.9997810"/>
            <tca model="poly3" focal="40.0" br="0.0000238" vr="1.0002715" bb="0.0000049" vb="0.9999070"/>
            <tca model="poly3" focal="53.0" br="0.0000017" vr="1.0001317" bb="-0.0000001" vb="1.0001057"/>
            <tca model="poly3" focal="60.0" br="-0.0000089" vr="1.0000545" bb="-0.0000084" vb="1.0002341"/>
            <tca model="poly3" focal="68.0" br="0.0000066" vr="0.9999577" bb="-0.0000048" vb="1.0003661"/>
            <tca model="poly3" focal="80.0" br="0.0000098" vr="0.9998537" bb="-0.0000310" vb="1.0004053"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>HD PENTAX-DA* 11-18mm f/2.8 ED DC AW</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.534</cropfactor>
        <calibration>
            <!-- Taken with Pentax KP -->
            <distortion model="ptlens" focal="11" a="-0.00408305" b="-0.007094" c="0.00775101"/>
            <distortion model="ptlens" focal="12" a="-0.00196261" b="-0.00966974" c="0.0100552"/>
            <distortion model="ptlens" focal="14" a="-0.000954218" b="-0.0041537" c="0.0089889"/>
            <distortion model="ptlens" focal="16" a="-0.000907399" b="0.00291915" c="0.000918396"/>
            <distortion model="ptlens" focal="18" a="0.0021858" b="-0.00682972" c="0.0109709"/>
            <tca model="poly3" focal="11" vr="1.0003174" vb="1.0001703"/>
            <tca model="poly3" focal="12" vr="1.0002729" vb="1.0002017"/>
            <tca model="poly3" focal="14" vr="1.0001285" vb="1.0002444"/>
            <tca model="poly3" focal="16" vr="1.0001119" vb="1.0001961"/>
            <tca model="poly3" focal="18" vr="1.0002036" vb="1.0000912"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>HD PENTAX DA* 16-50mm f/2.8 ED PLM AW</model>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.546</cropfactor>
        <calibration>
            <!-- Taken with K-3 Mark III -->
            <distortion model="ptlens" focal="16" a="0.02837" b="-0.08064" c="0.03429"/>
            <distortion model="ptlens" focal="19" a="0.01247" b="-0.03282" c="0.00562"/>
            <distortion model="ptlens" focal="28" a="0.10617" b="-0.38506" c="0.4381"/>
            <distortion model="ptlens" focal="36" a="0.00288" b="-0.00304" c="0.00106"/>
            <distortion model="ptlens" focal="50" a="-0.00117" b="0.0135" c="-0.01385"/>
            <tca model="poly3" focal="16" vr="1.0001531" vb="0.9999967"/>
            <tca model="poly3" focal="19" vr="1.0000990" vb="0.9999940"/>
            <tca model="poly3" focal="28" vr="1.0000588" vb="1.0000178"/>
            <tca model="poly3" focal="36" vr="0.9999965" vb="0.9999863"/>
            <tca model="poly3" focal="50" vr="0.9999438" vb="0.9999804"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc PENTAX-F ZOOM 35-70mm f/3.5-4.5</model>
        <mount>Pentax K</mount>
        <cropfactor>1.538</cropfactor>
        <calibration>
            <!-- Taken with Pentax K20D -->
            <distortion model="ptlens" focal="35" a="0.0029795" b="-0.0169706" c="0.0094146"/>
            <distortion model="ptlens" focal="45" a="-0.0004702" b="0.0032256" c="-0.0102588"/>
            <distortion model="ptlens" focal="50" a="0.0062203" b="-0.0237862" c="0.0332323"/>
            <distortion model="ptlens" focal="60" a="-0.0087412" b="0.0255429" c="-0.0119117"/>
            <distortion model="ptlens" focal="70" a="0.0076255" b="-0.0274699" c="0.0373287"/>
            <tca model="poly3" focal="35" vr="1.0002254" vb="1.0000726"/>
            <tca model="poly3" focal="45" vr="1.0001346" vb="1.0001010"/>
            <tca model="poly3" focal="50" vr="1.0000664" vb="1.0001334"/>
            <tca model="poly3" focal="60" vr="1.0000188" vb="1.0001530"/>
            <tca model="poly3" focal="70" vr="1.0000365" vb="1.0000631"/>
        </calibration>
    </lens>
    <lens>
        <maker>Pentax</maker>
        <model>smc PENTAX-M 50mm f/1.4</model>
        <mount>Pentax K</mount>
        <cropfactor>1.538</cropfactor>
        <calibration>
            <!-- Taken with Pentax K20D -->
            <distortion model="ptlens" focal="50" a="-0.00072809" b="-0.000329008" c="0.000031"/>
            <tca model="poly3" focal="50" vr="1.0002201" vb="0.9997294"/>
        </calibration>
    </lens>
</lensdatabase>
