<lensdatabase version="1">
    <lens>
        <maker>Samyang</maker>
        <model>Samyang 7.5mm f/3.5 UMC Fish-eye MFT</model>
        <model lang="de">Samyang 7.5mm f/3.5 UMC Fischauge MFT</model>
        <mount>Micro 4/3 System</mount>
        <focal value="7.5"/>
        <aperture min="3.5" max="22"/>
        <type>fisheye</type>
        <cropfactor>2</cropfactor>
        <aspect-ratio>4:3</aspect-ratio>
        <calibration>
            <distortion focal="7.5" model="ptlens" a="-0.0133116" b="0.00822383" c="-0.0180619"/>
            <tca model="poly3" focal="7.5" br="-0.0001120" vr="1.0003181" bb="0.0000315" vb="0.9999183"/>
            <!-- Taken with Fujifilm X-T1 -->
            <vignetting model="pa" focal="7.5" aperture="3.5" distance="0.09" k1="-0.6898" k2="0.5629" k3="-0.2798"/>
            <vignetting model="pa" focal="7.5" aperture="3.5" distance="0.18" k1="-1.0041" k2="1.6690" k3="-0.9910"/>
            <vignetting model="pa" focal="7.5" aperture="3.5" distance="0.54" k1="-1.0954" k2="1.8097" k3="-1.0871"/>
            <vignetting model="pa" focal="7.5" aperture="3.5" distance="1000" k1="-1.1157" k2="1.9882" k3="-1.2723"/>
            <vignetting model="pa" focal="7.5" aperture="4" distance="0.09" k1="-0.6381" k2="0.4763" k3="-0.2415"/>
            <vignetting model="pa" focal="7.5" aperture="4" distance="0.18" k1="-0.8935" k2="1.3156" k3="-0.7649"/>
            <vignetting model="pa" focal="7.5" aperture="4" distance="0.54" k1="-1.0314" k2="1.6246" k3="-0.9735"/>
            <vignetting model="pa" focal="7.5" aperture="4" distance="1000" k1="-1.1245" k2="2.0645" k3="-1.3261"/>
            <vignetting model="pa" focal="7.5" aperture="5.6" distance="0.09" k1="-0.7704" k2="1.0367" k3="-0.6094"/>
            <vignetting model="pa" focal="7.5" aperture="5.6" distance="0.18" k1="-1.0225" k2="1.7532" k3="-0.9869"/>
            <vignetting model="pa" focal="7.5" aperture="5.6" distance="0.54" k1="-1.1394" k2="2.0518" k3="-1.2608"/>
            <vignetting model="pa" focal="7.5" aperture="5.6" distance="1000" k1="-1.2338" k2="2.5227" k3="-1.6312"/>
            <vignetting model="pa" focal="7.5" aperture="8" distance="0.09" k1="-0.8748" k2="1.2274" k3="-0.6025"/>
            <vignetting model="pa" focal="7.5" aperture="8" distance="0.18" k1="-0.9885" k2="1.6290" k3="-0.8701"/>
            <vignetting model="pa" focal="7.5" aperture="8" distance="0.54" k1="-0.9302" k2="1.1116" k3="-0.4253"/>
            <vignetting model="pa" focal="7.5" aperture="8" distance="1000" k1="-0.9312" k2="1.1169" k3="-0.4030"/>
            <vignetting model="pa" focal="7.5" aperture="22" distance="0.09" k1="-0.8023" k2="0.9555" k3="-0.4032"/>
            <vignetting model="pa" focal="7.5" aperture="22" distance="0.18" k1="-0.9166" k2="1.2514" k3="-0.6183"/>
            <vignetting model="pa" focal="7.5" aperture="22" distance="0.54" k1="-0.9866" k2="1.2614" k3="-0.5698"/>
            <vignetting model="pa" focal="7.5" aperture="22" distance="1000" k1="-1.0589" k2="1.5841" k3="-0.8397"/>
        </calibration>
    </lens>
    <lens>
        <maker>Samyang</maker>
        <model>Samyang 8mm f/2.8 UMC Fish-eye</model>
        <model lang="de">Samyang 8mm f/2.8 UMC Fischauge</model>
        <mount>Sony E</mount>
        <mount>Fujifilm X</mount>
        <mount>Samsung NX</mount>
        <type>stereographic</type>
        <cropfactor>1.534</cropfactor>
        <calibration>
            <!-- Taken with Sony NEX-7 -->
            <!-- Measured with a 360° panorama -->
            <distortion model="ptlens" focal="8" a="0.02036" b="-0.08028" c="0.01446"/>
            <tca model="poly3" focal="8" br="-0.0000138" vr="1.0000964" bb="0.0001036" vb="1.0000325"/>
            <vignetting model="pa" focal="8" aperture="2.8" distance="0.3" k1="-1.4924" k2="1.0081" k3="-0.3500"/>
            <vignetting model="pa" focal="8" aperture="2.8" distance="1" k1="-1.5090" k2="0.9829" k3="-0.3162"/>
            <vignetting model="pa" focal="8" aperture="2.8" distance="1000" k1="-1.5018" k2="0.9506" k3="-0.2946"/>
            <vignetting model="pa" focal="8" aperture="4" distance="0.3" k1="-0.9478" k2="0.6408" k3="-0.4329"/>
            <vignetting model="pa" focal="8" aperture="4" distance="1" k1="-1.0029" k2="0.7332" k3="-0.4824"/>
            <vignetting model="pa" focal="8" aperture="4" distance="1000" k1="-1.0418" k2="0.7092" k3="-0.4377"/>
            <vignetting model="pa" focal="8" aperture="5.6" distance="0.3" k1="-1.0401" k2="0.9822" k3="-0.5842"/>
            <vignetting model="pa" focal="8" aperture="5.6" distance="1" k1="-1.0795" k2="1.0230" k3="-0.6008"/>
            <vignetting model="pa" focal="8" aperture="5.6" distance="1000" k1="-1.1067" k2="1.0544" k3="-0.6145"/>
            <vignetting model="pa" focal="8" aperture="8" distance="0.3" k1="-1.0299" k2="0.9615" k3="-0.5692"/>
            <vignetting model="pa" focal="8" aperture="8" distance="1" k1="-1.0667" k2="0.9822" k3="-0.5667"/>
            <vignetting model="pa" focal="8" aperture="8" distance="1000" k1="-1.0408" k2="0.9345" k3="-0.5484"/>
            <vignetting model="pa" focal="8" aperture="22" distance="0.3" k1="-1.0752" k2="1.0060" k3="-0.5789"/>
            <vignetting model="pa" focal="8" aperture="22" distance="1" k1="-1.0814" k2="1.0593" k3="-0.6292"/>
            <vignetting model="pa" focal="8" aperture="22" distance="1000" k1="-1.0709" k2="0.9444" k3="-0.5355"/>
            <real-focal-length focal="8" real-focal="8.405"/>
        </calibration>
    </lens>
    <lens>
        <maker>Samyang</maker>
        <model>Samyang 50mm f/1.4 AS UMC</model>
        <mount>Sony E</mount>
        <cropfactor>1.534</cropfactor>
        <calibration>
            <!-- Taken with Sony NEX-7 -->
            <distortion model="poly3" focal="50" k1="-0.00445"/>
            <tca model="poly3" focal="50" vr="1.0001" vb="1.0001"/>
        </calibration>
    </lens>
    <lens>
        <maker>Samyang</maker>
        <model>Samyang 12mm f/2.0 NCS CS</model>
        <mount>Sony E</mount>
        <mount>Fujifilm X</mount>
        <mount>Micro 4/3 System</mount>
        <mount>Samsung NX</mount>
        <mount>Canon EF-M</mount>
        <cropfactor>1.534</cropfactor>
        <calibration>
            <!-- Taken with Sony NEX-7 -->
            <distortion model="ptlens" focal="12" a="0.0097" b="-0.04108" c="0.03623"/>
            <tca model="poly3" focal="12" br="0.0000203" vr="1.0001380" bb="0.0002099" vb="1.0001907"/>
            <!-- Taken with Fujifilm X camera (cropfactor 1.529) -->
            <vignetting model="pa" focal="12" aperture="2" distance="10" k1="-1.6043" k2="1.4148" k3="-0.5957"/>
            <vignetting model="pa" focal="12" aperture="2" distance="1000" k1="-1.6043" k2="1.4148" k3="-0.5957"/>
            <vignetting model="pa" focal="12" aperture="2.8" distance="10" k1="-1.0849" k2="0.8287" k3="-0.4311"/>
            <vignetting model="pa" focal="12" aperture="2.8" distance="1000" k1="-1.0849" k2="0.8287" k3="-0.4311"/>
            <vignetting model="pa" focal="12" aperture="4" distance="10" k1="-1.1396" k2="0.9654" k3="-0.4291"/>
            <vignetting model="pa" focal="12" aperture="4" distance="1000" k1="-1.1396" k2="0.9654" k3="-0.4291"/>
            <vignetting model="pa" focal="12" aperture="5.6" distance="10" k1="-1.0997" k2="0.7894" k3="-0.2590"/>
            <vignetting model="pa" focal="12" aperture="5.6" distance="1000" k1="-1.0997" k2="0.7894" k3="-0.2590"/>
            <vignetting model="pa" focal="12" aperture="8" distance="10" k1="-1.1070" k2="0.8060" k3="-0.2703"/>
            <vignetting model="pa" focal="12" aperture="8" distance="1000" k1="-1.1070" k2="0.8060" k3="-0.2703"/>
            <vignetting model="pa" focal="12" aperture="11" distance="10" k1="-1.1113" k2="0.8092" k3="-0.2697"/>
            <vignetting model="pa" focal="12" aperture="11" distance="1000" k1="-1.1113" k2="0.8092" k3="-0.2697"/>
            <vignetting model="pa" focal="12" aperture="16" distance="10" k1="-1.1239" k2="0.8343" k3="-0.2845"/>
            <vignetting model="pa" focal="12" aperture="16" distance="1000" k1="-1.1239" k2="0.8343" k3="-0.2845"/>
            <vignetting model="pa" focal="12" aperture="22" distance="10" k1="-1.1410" k2="0.8662" k3="-0.3026"/>
            <vignetting model="pa" focal="12" aperture="22" distance="1000" k1="-1.1410" k2="0.8662" k3="-0.3026"/>
        </calibration>
    </lens>
    <lens>
        <maker>Samyang</maker>
        <model>Samyang AF 35mm f/2.8</model>
        <mount>Sony E</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="35" a="-0.01307" b="0.03113" c="-0.02617"/>
            <tca model="poly3" focal="35" vr="1.0000779" vb="1.0001644"/>
            <vignetting model="pa" focal="35" aperture="2.8" distance="10" k1="-0.8522900743508066" k2="0.3411632584595528" k3="-0.05296039620525643"/>
            <vignetting model="pa" focal="35" aperture="2.8" distance="1000" k1="-0.8522900743508066" k2="0.3411632584595528" k3="-0.05296039620525643"/>
            <vignetting model="pa" focal="35" aperture="3.2" distance="10" k1="-0.7051169716117284" k2="0.06537655201820364" k3="0.09478211721767357"/>
            <vignetting model="pa" focal="35" aperture="3.2" distance="1000" k1="-0.7051169716117284" k2="0.06537655201820364" k3="0.09478211721767357"/>
            <vignetting model="pa" focal="35" aperture="4.5" distance="10" k1="-0.35910093585197833" k2="-0.24541192056278915" k3="0.15587472504298538"/>
            <vignetting model="pa" focal="35" aperture="4.5" distance="1000" k1="-0.35910093585197833" k2="-0.24541192056278915" k3="0.15587472504298538"/>
            <vignetting model="pa" focal="35" aperture="5.6" distance="10" k1="-0.4376304869547293" k2="0.14420666448354602" k3="-0.1308035768627717"/>
            <vignetting model="pa" focal="35" aperture="5.6" distance="1000" k1="-0.4376304869547293" k2="0.14420666448354602" k3="-0.1308035768627717"/>
            <vignetting model="pa" focal="35" aperture="10.0" distance="10" k1="-0.5466954731371074" k2="0.41921677896498233" k3="-0.2154772739312098"/>
            <vignetting model="pa" focal="35" aperture="10.0" distance="1000" k1="-0.5466954731371074" k2="0.41921677896498233" k3="-0.2154772739312098"/>
            <vignetting model="pa" focal="35" aperture="22.0" distance="10" k1="-0.5156175411692957" k2="0.26441866850979084" k3="-0.06685863655580566"/>
            <vignetting model="pa" focal="35" aperture="22.0" distance="1000" k1="-0.5156175411692957" k2="0.26441866850979084" k3="-0.06685863655580566"/>
        </calibration>
    </lens>
    <lens>
        <maker>Samyang</maker>
        <model>Samyang AF 14mm f/2.8</model>
        <model lang="en">Samyang AF 14mm f/2.8</model>
        <mount>Sony E</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taken with ILCE-7M2 -->
            <distortion model="ptlens" focal="14" a="0.04751" b="-0.16492" c="0.1496"/>
        </calibration>
    </lens>
    <lens>
        <maker>Samyang</maker>
        <model>Samyang AF 24mm f/2.8</model>
        <model lang="en">Samyang AF 24mm f/2.8</model>
        <mount>Sony E</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taken with ILCE-7M2 -->
            <distortion model="ptlens" focal="24" a="0.01564" b="-0.02852" c="0.00751"/>
            <vignetting model="pa" focal="24.0" aperture="2.8" distance="10" k1="-2.8657166" k2="3.4130702" k3="-1.4964271"/>
            <vignetting model="pa" focal="24.0" aperture="2.8" distance="1000" k1="-2.8657166" k2="3.4130702" k3="-1.4964271"/>
            <vignetting model="pa" focal="24.0" aperture="3.2" distance="10" k1="-1.9361222" k2="1.2808599" k3="-0.2426904"/>
            <vignetting model="pa" focal="24.0" aperture="3.2" distance="1000" k1="-1.9361222" k2="1.2808599" k3="-0.2426904"/>
            <vignetting model="pa" focal="24.0" aperture="3.5" distance="10" k1="-1.5913415" k2="0.7993512" k3="-0.0751884"/>
            <vignetting model="pa" focal="24.0" aperture="3.5" distance="1000" k1="-1.5913415" k2="0.7993512" k3="-0.0751884"/>
            <vignetting model="pa" focal="24.0" aperture="4.0" distance="10" k1="-1.5819555" k2="0.9314852" k3="-0.2029913"/>
            <vignetting model="pa" focal="24.0" aperture="4.0" distance="1000" k1="-1.5819555" k2="0.9314852" k3="-0.2029913"/>
            <vignetting model="pa" focal="24.0" aperture="4.5" distance="10" k1="-1.6056173" k2="1.0810133" k3="-0.3186936"/>
            <vignetting model="pa" focal="24.0" aperture="4.5" distance="1000" k1="-1.6056173" k2="1.0810133" k3="-0.3186936"/>
            <vignetting model="pa" focal="24.0" aperture="5.0" distance="10" k1="-1.6364913" k2="1.1926612" k3="-0.3882603"/>
            <vignetting model="pa" focal="24.0" aperture="5.0" distance="1000" k1="-1.6364913" k2="1.1926612" k3="-0.3882603"/>
            <vignetting model="pa" focal="24.0" aperture="5.6" distance="10" k1="-1.6489708" k2="1.2239532" k3="-0.3979710"/>
            <vignetting model="pa" focal="24.0" aperture="5.6" distance="1000" k1="-1.6489708" k2="1.2239532" k3="-0.3979710"/>
            <vignetting model="pa" focal="24.0" aperture="6.3" distance="10" k1="-1.6415316" k2="1.1883553" k3="-0.3580674"/>
            <vignetting model="pa" focal="24.0" aperture="6.3" distance="1000" k1="-1.6415316" k2="1.1883553" k3="-0.3580674"/>
            <vignetting model="pa" focal="24.0" aperture="7.1" distance="10" k1="-1.6402486" k2="1.1837875" k3="-0.3538495"/>
            <vignetting model="pa" focal="24.0" aperture="7.1" distance="1000" k1="-1.6402486" k2="1.1837875" k3="-0.3538495"/>
            <vignetting model="pa" focal="24.0" aperture="8.0" distance="10" k1="-1.6510733" k2="1.2072114" k3="-0.3662549"/>
            <vignetting model="pa" focal="24.0" aperture="8.0" distance="1000" k1="-1.6510733" k2="1.2072114" k3="-0.3662549"/>
            <vignetting model="pa" focal="24.0" aperture="11.0" distance="10" k1="-1.7243561" k2="1.3102248" k3="-0.4094080"/>
            <vignetting model="pa" focal="24.0" aperture="11.0" distance="1000" k1="-1.7243561" k2="1.3102248" k3="-0.4094080"/>
            <vignetting model="pa" focal="24.0" aperture="16.0" distance="10" k1="-1.7421938" k2="1.3468963" k3="-0.4296444"/>
            <vignetting model="pa" focal="24.0" aperture="16.0" distance="1000" k1="-1.7421938" k2="1.3468963" k3="-0.4296444"/>
            <vignetting model="pa" focal="24.0" aperture="22.0" distance="10" k1="-1.8011240" k2="1.4499840" k3="-0.4765021"/>
            <vignetting model="pa" focal="24.0" aperture="22.0" distance="1000" k1="-1.8011240" k2="1.4499840" k3="-0.4765021"/>
        </calibration>
    </lens>
    <lens>
        <!-- Thanks to ndu2 for data -->
        <maker>Samyang</maker>
        <model>Samyang AF 45mm f/1.8</model>
        <mount>Sony E</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="45" a="-0.0024" b="-0.00083" c="0.00418"/>
            <tca model="poly3" focal="45" vr="0.9999832" vb="0.9997859"/>
            <tca model="poly3" focal="45" vr="0.9999881" vb="0.9997891"/>
            <tca model="poly3" focal="45" vr="1.0000542" vb="0.9998050"/>
            <tca model="poly3" focal="45" vr="1.0000571" vb="0.9997949"/>
            <tca model="poly3" focal="45" vr="1.0000591" vb="0.9998019"/>
            <vignetting model="pa" focal="45" aperture="1.8" distance="10" k1="-1.6692" k2="1.7384" k3="-0.7699"/>
            <vignetting model="pa" focal="45" aperture="1.8" distance="1000" k1="-1.6692" k2="1.7384" k3="-0.7699"/>
            <vignetting model="pa" focal="45" aperture="2" distance="10" k1="-1.0363" k2="0.4369" k3="-0.0449"/>
            <vignetting model="pa" focal="45" aperture="2" distance="1000" k1="-1.0363" k2="0.4369" k3="-0.0449"/>
            <vignetting model="pa" focal="45" aperture="2.2" distance="10" k1="-0.4480" k2="-0.3993" k3="0.3087"/>
            <vignetting model="pa" focal="45" aperture="2.2" distance="1000" k1="-0.4480" k2="-0.3993" k3="0.3087"/>
            <vignetting model="pa" focal="45" aperture="2.5" distance="10" k1="-0.5832" k2="0.0773" k3="0.0045"/>
            <vignetting model="pa" focal="45" aperture="2.5" distance="1000" k1="-0.5832" k2="0.0773" k3="0.0045"/>
            <vignetting model="pa" focal="45" aperture="2.8" distance="10" k1="-0.9296" k2="0.7392" k3="-0.3177"/>
            <vignetting model="pa" focal="45" aperture="2.8" distance="1000" k1="-0.9296" k2="0.7392" k3="-0.3177"/>
            <vignetting model="pa" focal="45" aperture="3.2" distance="10" k1="-0.8646" k2="0.5598" k3="-0.1937"/>
            <vignetting model="pa" focal="45" aperture="3.2" distance="1000" k1="-0.8646" k2="0.5598" k3="-0.1937"/>
            <vignetting model="pa" focal="45" aperture="3.5" distance="10" k1="-0.8576" k2="0.4767" k3="-0.1440"/>
            <vignetting model="pa" focal="45" aperture="3.5" distance="1000" k1="-0.8576" k2="0.4767" k3="-0.1440"/>
            <vignetting model="pa" focal="45" aperture="4" distance="10" k1="-0.8519" k2="0.4042" k3="-0.0928"/>
            <vignetting model="pa" focal="45" aperture="4" distance="1000" k1="-0.8519" k2="0.4042" k3="-0.0928"/>
            <vignetting model="pa" focal="45" aperture="4.5" distance="10" k1="-0.8383" k2="0.3965" k3="-0.0991"/>
            <vignetting model="pa" focal="45" aperture="4.5" distance="1000" k1="-0.8383" k2="0.3965" k3="-0.0991"/>
            <vignetting model="pa" focal="45" aperture="5" distance="10" k1="-0.8187" k2="0.3477" k3="-0.0786"/>
            <vignetting model="pa" focal="45" aperture="5" distance="1000" k1="-0.8187" k2="0.3477" k3="-0.0786"/>
            <vignetting model="pa" focal="45" aperture="5.6" distance="10" k1="-0.8097" k2="0.3420" k3="-0.0843"/>
            <vignetting model="pa" focal="45" aperture="5.6" distance="1000" k1="-0.8097" k2="0.3420" k3="-0.0843"/>
            <vignetting model="pa" focal="45" aperture="6.3" distance="10" k1="-0.7996" k2="0.3189" k3="-0.0678"/>
            <vignetting model="pa" focal="45" aperture="6.3" distance="1000" k1="-0.7996" k2="0.3189" k3="-0.0678"/>
            <vignetting model="pa" focal="45" aperture="22" distance="10" k1="-0.8160" k2="0.2762" k3="-0.0272"/>
            <vignetting model="pa" focal="45" aperture="22" distance="1000" k1="-0.8160" k2="0.2762" k3="-0.0272"/>
        </calibration>
    </lens>
    <lens>
        <!-- Thanks to ndu2 for data -->
        <maker>Samyang</maker>
        <model>Samyang AF 85mm f/1.4</model>
        <mount>Sony E</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="85" a="-0.00737" b="0.0226" c="-0.02139"/>
            <tca model="poly3" focal="85" vr="0.9999798" vb="0.9998578"/>
            <tca model="poly3" focal="85" vr="0.9999826" vb="0.9998500"/>
            <tca model="poly3" focal="85" vr="0.9999838" vb="0.9998444"/>
            <tca model="poly3" focal="85" vr="0.9999856" vb="0.9998458"/>
            <tca model="poly3" focal="85" vr="0.9999871" vb="0.9998529"/>
            <tca model="poly3" focal="85" vr="0.9999875" vb="0.9998568"/>
            <tca model="poly3" focal="85" vr="1.0000132" vb="0.9998255"/>
            <tca model="poly3" focal="85" vr="1.0000160" vb="0.9998137"/>
            <tca model="poly3" focal="85" vr="1.0000197" vb="0.9998246"/>
        </calibration>
    </lens>
    <lens>
        <maker>Samyang</maker>
        <model>Samyang AF 24mm f/1.8</model>
        <mount>Sony E</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taken with ILCE 7M4 -->
            <distortion model="ptlens" focal="24" a="0.01569" b="-0.03867" c="-0.00004"/>
            <tca model="poly3" focal="24" vr="1.0001037" vb="0.9999944"/>
        </calibration>
    </lens>
    <lens>
        <maker>Samyang</maker>
        <model>Samyang AF 12mm f/2.0</model>
        <mount>Sony E</mount>
        <mount>Fujifilm X</mount>
        <cropfactor>1.534</cropfactor>
        <calibration>
            <!-- Taken with ILCE-5100 -->
            <distortion model="ptlens" focal="12.0" a="0.01" b="-0.037" c="0.021"/>
            <tca model="poly3" focal="12.0" br="0.0000539" vr="1.0002125" bb="-0.0000235" vb="1.0003006"/>
        </calibration>
    </lens>
    <lens>
        <maker>Samyang</maker>
        <model>Samyang AF 18mm f/2.8</model>
        <mount>Sony E</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taken with ILCE-7M3, coefficients fitted from exif data by lf_fitexif_se -->
            <distortion model="ptlens" focal="18" a="0.02072794438055051" b="-0.055421093067902875" c="0.022351964872009425"/>
        </calibration>
    </lens>
    <lens>
        <maker>Samyang</maker>
        <model>Samyang AF 75mm f/1.8</model>
        <mount>Sony E</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taken with ILCE-7M3, coefficients fitted from exif data by lf_fitexif_se, except tca -->
            <distortion model="ptlens" focal="75" a="-0.0014565" b="0.0036664" c="-0.0018816"/>
            <tca model="poly3" focal="75" vr="0.9999345" vb="0.9999558"/>
            <vignetting model="pa" focal="75" aperture="1.8" distance="147.16" k1="-0.8826677" k2="0.3580256" k3="-0.1027655"/>
            <vignetting model="pa" focal="75" aperture="2.4" distance="147.16" k1="-0.3830348" k2="-0.2826643" k3="0.1597678"/>
            <vignetting model="pa" focal="75" aperture="3.5" distance="147.16" k1="-0.1646405" k2="-0.0735751" k3="-0.1152835"/>
            <vignetting model="pa" focal="75" aperture="4.5" distance="147.16" k1="-0.2444249" k2="0.2644670" k3="-0.2712635"/>
            <vignetting model="pa" focal="75" aperture="22.0" distance="147.16" k1="-0.1908762" k2="-0.0272345" k3="0.0481287"/>
        </calibration>
    </lens>
    <lens>
        <maker>Samyang</maker>
        <model>Samyang AF 35mm f/1.8</model>
        <mount>Sony E</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taken with ILCE-7M3, coefficients fitted from exif data by lf_fitexif_se, except tca -->
            <distortion model="ptlens" focal="35" a="0.0122154" b="-0.0474074" c="0.0348816"/>
            <tca model="poly3" focal="35" vr="1.0001321" vb="0.9999907"/>
            <vignetting model="pa" focal="35" aperture="1.8" distance="68.68" k1="-1.4568366" k2="0.8730748" k3="-0.2082213"/>
            <vignetting model="pa" focal="35" aperture="2.4" distance="68.68" k1="-0.8374828" k2="-0.2165907" k3="0.3190586"/>
            <vignetting model="pa" focal="35" aperture="22.0" distance="68.68" k1="-0.5415322" k2="-0.0031567" k3="0.0431025"/>
            <vignetting model="pa" focal="35" aperture="3.5" distance="68.68" k1="-0.4569792" k2="-0.4798250" k3="0.2715231"/>
            <vignetting model="pa" focal="35" aperture="4.5" distance="68.68" k1="-0.5439260" k2="0.0807181" k3="-0.1427609"/>
        </calibration>
    </lens>
    <lens>
        <maker>Samyang</maker>
        <model>Samyang XP 10mm f/3.5</model>
        <mount>Canon EF</mount>
        <cropfactor>1.005</cropfactor>
        <calibration>
            <!-- Taken with Canon EOS 6D -->
            <distortion model="ptlens" focal="10" a="0.01004" b="-0.05209" c="0.0642"/>
            <tca model="poly3" focal="10" vr="1.0000242" vb="1.0001439"/>
        </calibration>
    </lens>
</lensdatabase>
