<lensdatabase version="1">
    <lens>
        <maker>Zeiss</maker>
        <model>Carl Zeiss Distagon T* 2/35 ZF.2</model>
        <mount>Nikon F AI-S</mount>
        <mount>Canon EF</mount>
        <mount>Pentax KAF2</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taken with Nikon D3 -->
            <distortion model="ptlens" focal="35" a="0.00786" b="-0.02862" c="0.01911"/>
            <tca model="poly3" focal="35" vr="1.0001515" vb="1.0001430"/>
            <vignetting model="pa" focal="35" aperture="2" distance="10" k1="-1.9515" k2="2.1666" k3="-0.9851"/>
            <vignetting model="pa" focal="35" aperture="2" distance="1000" k1="-1.9515" k2="2.1666" k3="-0.9851"/>
            <vignetting model="pa" focal="35" aperture="2.8" distance="10" k1="-1.2284" k2="0.5638" k3="-0.0563"/>
            <vignetting model="pa" focal="35" aperture="2.8" distance="1000" k1="-1.2284" k2="0.5638" k3="-0.0563"/>
            <vignetting model="pa" focal="35" aperture="4" distance="10" k1="-0.2027" k2="-0.7027" k3="0.3671"/>
            <vignetting model="pa" focal="35" aperture="4" distance="1000" k1="-0.2027" k2="-0.7027" k3="0.3671"/>
            <vignetting model="pa" focal="35" aperture="5.6" distance="10" k1="-0.4527" k2="0.3264" k3="-0.2138"/>
            <vignetting model="pa" focal="35" aperture="5.6" distance="1000" k1="-0.4527" k2="0.3264" k3="-0.2138"/>
            <vignetting model="pa" focal="35" aperture="22" distance="10" k1="-0.4222" k2="0.1561" k3="-0.0315"/>
            <vignetting model="pa" focal="35" aperture="22" distance="1000" k1="-0.4222" k2="0.1561" k3="-0.0315"/>
        </calibration>
    </lens>
    <lens>
        <!-- Also update copy at "Carl Zeiss Distagon T* 2,8/21 ZE" below. -->
        <maker>Zeiss</maker>
        <model>Carl Zeiss Distagon T* 2,8/21 ZF.2</model>
        <mount>Nikon F AI-S</mount>
        <mount>Canon EF</mount>
        <mount>Pentax KAF2</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taken with Nikon D800E -->
            <distortion model="ptlens" focal="21" a="0.03083" b="-0.0633" c="0.01093"/>
            <tca model="linear" focal="21" kr="1.0001" kb="1.0001"/>
        </calibration>
    </lens>
    <lens>
        <maker>Zeiss</maker>
        <model>Carl Zeiss Jena 1Q Biotar 1:2 f=58mm T</model>
        <mount>M42</mount>
        <cropfactor>1.538</cropfactor>
        <calibration>
            <!-- Taken with Pentax K20D -->
            <distortion model="poly3" focal="58" k1="0.0017"/>
            <tca model="poly3" focal="58" vr="0.9999881" vb="0.9999867"/>
        </calibration>
    </lens>
    <lens>
        <maker>Zeiss</maker>
        <model>Zeiss Distagon T* 25mm f/2.8 ZF.2</model>
        <mount>Nikon F AI-S</mount>
        <mount>Pentax KAF2</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taken with Nikon D810 -->
            <vignetting model="pa" focal="25" aperture="2.8" distance="10" k1="-2.0722" k2="2.3741" k3="-1.0791"/>
            <vignetting model="pa" focal="25" aperture="2.8" distance="1000" k1="-2.0722" k2="2.3741" k3="-1.0791"/>
            <vignetting model="pa" focal="25" aperture="4" distance="10" k1="-0.4967" k2="-0.4770" k3="0.3717"/>
            <vignetting model="pa" focal="25" aperture="4" distance="1000" k1="-0.4967" k2="-0.4770" k3="0.3717"/>
            <vignetting model="pa" focal="25" aperture="5.6" distance="10" k1="-0.6803" k2="0.4196" k3="-0.1860"/>
            <vignetting model="pa" focal="25" aperture="5.6" distance="1000" k1="-0.6803" k2="0.4196" k3="-0.1860"/>
            <vignetting model="pa" focal="25" aperture="8" distance="10" k1="-0.6634" k2="0.3401" k3="-0.1020"/>
            <vignetting model="pa" focal="25" aperture="8" distance="1000" k1="-0.6634" k2="0.3401" k3="-0.1020"/>
            <vignetting model="pa" focal="25" aperture="22" distance="10" k1="-0.6497" k2="0.2995" k3="-0.0740"/>
            <vignetting model="pa" focal="25" aperture="22" distance="1000" k1="-0.6497" k2="0.2995" k3="-0.0740"/>
        </calibration>
    </lens>
    <lens>
        <maker>Zeiss</maker>
        <model>Zeiss Milvus 1.4/50</model>
        <mount>Canon EF</mount>
        <mount>Nikon F AI-S</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taken with Sony A7R3 + EF adapter -->
            <distortion model="poly3" focal="50" k1="-0.002311"/>
            <tca model="poly3" focal="50" br="-0.0000953" vr="1.0001884" bb="0.0001209" vb="0.9997801"/>
        </calibration>
    </lens>
    <lens>
        <maker>Zeiss</maker>
        <model>Zeiss Otus 85mm f/1.4</model>
        <mount>Nikon F AF</mount>
        <mount>Canon EF</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taken with Nikon D810 -->
            <distortion model="poly3" focal="85" k1="0.001793"/>
        </calibration>
    </lens>
    <lens>
        <maker>Zeiss</maker>
        <model>Carl Zeiss Planar T* 1,4/50 ZF.2</model>
        <mount>Nikon F AF</mount>
        <mount>Canon EF</mount>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.523</cropfactor>
        <calibration>
            <!-- Taken with Nikon D90 -->
            <distortion model="ptlens" focal="50.0" a="0.002" b="-0.01" c="0.005"/>
        </calibration>
    </lens>
    <lens>
        <maker>Zeiss</maker>
        <model>Carl Zeiss Distagon T* 3,5/18 ZF.2</model>
        <mount>Nikon F AF</mount>
        <mount>Canon EF</mount>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <!-- Taken with Nikon D700 -->
            <distortion model="ptlens" focal="18.0" a="0.035" b="-0.074" c="0.024"/>
        </calibration>
    </lens>
    <lens>
        <maker>Zeiss</maker>
        <model>Carl Zeiss Planar T* 1,4/50 ZF.2</model>
        <mount>Nikon F AF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <!-- Taken with Nikon D700 -->
            <distortion model="ptlens" focal="50.0" a="0.002" b="-0.017" c="0.021"/>
            <tca model="poly3" focal="50.0" br="-0.0000683" vr="1.0002343" bb="0.0001071" vb="0.9997046"/>
        </calibration>
    </lens>
    <lens>
        <maker>Zeiss</maker>
        <model>Carl Zeiss Distagon T* 3,5/18 ZF.2</model>
        <mount>Nikon F AF</mount>
        <mount>Canon EF</mount>
        <mount>Pentax KAF2</mount>
        <cropfactor>1.523</cropfactor>
        <calibration>
            <!-- Taken with Nikon D90 -->
            <distortion model="ptlens" focal="18.0" a="0.004" b="-0.001" c="-0.04"/>
            <tca model="poly3" focal="18.0" br="0.0000003" vr="1.0003792" bb="0.0000203" vb="0.9999204"/>
        </calibration>
    </lens>
    <lens>
        <maker>Zeiss</maker>
        <model>Touit 2.8/50M</model>
        <mount>Fujifilm X</mount>
        <cropfactor>1.529</cropfactor>
        <calibration>
            <!-- Taken with Fujifilm X-E3 -->
            <distortion model="ptlens" focal="50" a="0.001765" b="0.000264" c="-0.002461"/>
            <tca model="poly3" focal="50" vr="1.0002192" vb="0.9999041"/>
            <tca model="poly3" focal="50" vr="1.0002484" vb="0.9999072"/>
            <tca model="poly3" focal="50" vr="1.0002575" vb="0.9998811"/>
            <tca model="poly3" focal="50" vr="1.0002799" vb="0.9998747"/>
            <tca model="poly3" focal="50" vr="1.0003135" vb="0.9998952"/>
            <tca model="poly3" focal="50" vr="1.0003157" vb="0.9998979"/>
            <vignetting model="pa" focal="50" aperture="2.8" distance="10" k1="-1.3070" k2="0.9955" k3="-0.3573"/>
            <vignetting model="pa" focal="50" aperture="2.8" distance="1000" k1="-1.3070" k2="0.9955" k3="-0.3573"/>
            <vignetting model="pa" focal="50" aperture="4" distance="10" k1="-0.0770" k2="-0.7963" k3="0.4513"/>
            <vignetting model="pa" focal="50" aperture="4" distance="1000" k1="-0.0770" k2="-0.7963" k3="0.4513"/>
            <vignetting model="pa" focal="50" aperture="5.6" distance="10" k1="-0.1472" k2="-0.0518" k3="-0.0978"/>
            <vignetting model="pa" focal="50" aperture="5.6" distance="1000" k1="-0.1472" k2="-0.0518" k3="-0.0978"/>
            <vignetting model="pa" focal="50" aperture="8" distance="10" k1="-0.2164" k2="0.0743" k3="-0.0545"/>
            <vignetting model="pa" focal="50" aperture="8" distance="1000" k1="-0.2164" k2="0.0743" k3="-0.0545"/>
            <vignetting model="pa" focal="50" aperture="11" distance="10" k1="-0.2074" k2="0.0286" k3="-0.0087"/>
            <vignetting model="pa" focal="50" aperture="11" distance="1000" k1="-0.2074" k2="0.0286" k3="-0.0087"/>
            <vignetting model="pa" focal="50" aperture="16" distance="10" k1="-0.2239" k2="0.0707" k3="-0.0391"/>
            <vignetting model="pa" focal="50" aperture="16" distance="1000" k1="-0.2239" k2="0.0707" k3="-0.0391"/>
            <vignetting model="pa" focal="50" aperture="22" distance="10" k1="-0.2226" k2="0.0553" k3="-0.0253"/>
            <vignetting model="pa" focal="50" aperture="22" distance="1000" k1="-0.2226" k2="0.0553" k3="-0.0253"/>
        </calibration>
    </lens>
    <lens>
        <maker>Zeiss</maker>
        <model>Zeiss Makro-Planar T* 2/100 ZF.2</model>
        <model lang="en">Makro-Planar T* 2/100</model>
        <mount>Nikon F AF</mount>
        <mount>Canon EF</mount>
        <mount>Pentax KAF4</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <!-- Taken with Pentax K-1 -->
            <distortion model="ptlens" focal="100.0" a="-0.0" b="-0.001" c="0.005"/>
            <tca model="poly3" focal="100.0" br="0.0000302" vr="0.9998207" bb="-0.0000339" vb="1.0000917"/>
        </calibration>
    </lens>
    <lens>
        <maker>Zeiss</maker>
        <model>Carl Zeiss Jena Flektogon 20mm f/4</model>
        <mount>M42</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <!-- Taken with Sony ILCE-7RM2 -->
            <distortion model="ptlens" focal="20" a="0.023236" b="-0.0547255" c="0.0131317"/>
            <tca model="poly3" focal="20" br="-0.0003499" vr="1.0008464" bb="0.0004538" vb="0.9991346"/>
        </calibration>
    </lens>
    <lens>
        <maker>Zeiss</maker>
        <model>Carl Zeiss Jena Flektogon 35mm f/2.4</model>
        <mount>M42</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <!-- Taken with Sony ILCE-7RM2 -->
            <distortion model="ptlens" focal="35" a="0.00842827" b="-0.0248384" c="0.011055"/>
            <tca model="poly3" focal="35" br="-0.0000355" vr="1.0002201" bb="0.0000797" vb="0.9997994"/>
        </calibration>
    </lens>
    <lens>
        <maker>Zeiss</maker>
        <model>Carl Zeiss Jena Tessar 50mm f/2.8</model>
        <mount>M42</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <!-- Taken with Sony ILCE-7RM2 -->
            <distortion model="ptlens" focal="50" a="-0.00106042" b="-0.00203377" c="0.00474299"/>
            <tca model="poly3" focal="50" br="-0.0000152" vr="1.0001208" bb="0.0000184" vb="0.9998896"/>
        </calibration>
    </lens>
    <lens>
        <maker>Zeiss</maker>
        <model>Carl Zeiss Jena Pancolar 50mm f/1.8</model>
        <mount>M42</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <!-- Taken with Sony ILCE-7RM2 -->
            <distortion model="ptlens" focal="50" a="8.94144e-06" b="-0.00580687" c="0.0046004"/>
            <tca model="poly3" focal="50" br="0.0000259" vr="0.9999865" bb="-0.0000324" vb="1.0000391"/>
        </calibration>
    </lens>
    <lens>
        <maker>Zeiss</maker>
        <model>Carl Zeiss Jena Biotar 58mm f/2</model>
        <mount>M42</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <!-- Taken with Sony ILCE-7RM2 -->
            <distortion model="ptlens" focal="58" a="0.00485921" b="-0.0152192" c="0.0170975"/>
            <tca model="poly3" focal="58" br="0.0000029" vr="0.9999840" bb="-0.0000067" vb="1.0000054"/>
        </calibration>
    </lens>
    <lens>
        <maker>Zeiss</maker>
        <model>Carl Zeiss Jena Sonnar 135mm f/3.5</model>
        <mount>M42</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <!-- Taken with Sony ILCE-7RM2 -->
            <distortion model="ptlens" focal="135" a="0.000694452" b="0.00204654" c="0.00157865"/>
            <tca model="poly3" focal="135" br="-0.0000118" vr="0.9997083" bb="-0.0000435" vb="1.0001135"/>
            <vignetting model="pa" focal="135" aperture="3.5" distance="10" k1="-1.0500" k2="1.3143" k3="-0.7419"/>
            <vignetting model="pa" focal="135" aperture="3.5" distance="1000" k1="-1.0500" k2="1.3143" k3="-0.7419"/>
            <vignetting model="pa" focal="135" aperture="5.6" distance="10" k1="-0.1327" k2="-0.1055" k3="-0.1124"/>
            <vignetting model="pa" focal="135" aperture="5.6" distance="1000" k1="-0.1327" k2="-0.1055" k3="-0.1124"/>
            <vignetting model="pa" focal="135" aperture="8" distance="10" k1="-0.3339" k2="0.7206" k3="-0.6513"/>
            <vignetting model="pa" focal="135" aperture="8" distance="1000" k1="-0.3339" k2="0.7206" k3="-0.6513"/>
            <vignetting model="pa" focal="135" aperture="11" distance="10" k1="-0.3122" k2="0.5497" k3="-0.4315"/>
            <vignetting model="pa" focal="135" aperture="11" distance="1000" k1="-0.3122" k2="0.5497" k3="-0.4315"/>
            <vignetting model="pa" focal="135" aperture="16" distance="10" k1="-0.3180" k2="0.5715" k3="-0.4487"/>
            <vignetting model="pa" focal="135" aperture="16" distance="1000" k1="-0.3180" k2="0.5715" k3="-0.4487"/>
            <vignetting model="pa" focal="135" aperture="22" distance="10" k1="-0.3162" k2="0.5702" k3="-0.4493"/>
            <vignetting model="pa" focal="135" aperture="22" distance="1000" k1="-0.3162" k2="0.5702" k3="-0.4493"/>
        </calibration>
    </lens>
    <lens>
        <maker>Zeiss</maker>
        <model>Carl Zeiss Jena Triotar-v2 135mm f/4</model>
        <mount>M42</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <!-- Taken with Sony ILCE-7RM2 -->
            <distortion model="ptlens" focal="135" a="0.00151986" b="-0.00383041" c="0.0056906"/>
            <tca model="poly3" focal="135" br="-0.0000135" vr="1.0000078" bb="0.0000129" vb="0.9999357"/>
        </calibration>
    </lens>
</lensdatabase>
