<lensdatabase>

    <mount>
        <name>Canon EF-S</name>
        <compat>Canon EF</compat>
        <compat>M42</compat>
        <compat>Generic</compat>
    </mount>

    <mount>
        <name>Canon EF</name>
        <compat>M42</compat>
        <compat>Generic</compat>
    </mount>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS 5D Mark III</model>
        <model lang="en">EOS 5D Mark III</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS 5D Mark II</model>
        <model lang="en">EOS 5D Mark II</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS 5D</model>
        <model lang="en">EOS 5D</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS-1DS</model>
        <model lang="en">EOS-1DS</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS-1Ds</model>
        <model lang="en">EOS-1Ds</model>
        <variant>*</variant>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS-1Ds Mark II</model>
        <model lang="en">EOS-1Ds Mark II</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS-1D Mark II</model>
        <model lang="en">EOS-1D Mark II</model>
        <mount>Canon EF</mount>
        <cropfactor>1.3</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS-1D Mark II N</model>
        <model lang="en">EOS-1D Mark II N</model>
        <mount>Canon EF</mount>
        <cropfactor>1.3</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS-1Ds Mark III</model>
        <model lang="en">EOS-1Ds Mark III</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS-1D Mark III</model>
        <model lang="en">EOS-1D Mark III</model>
        <mount>Canon EF</mount>
        <cropfactor>1.3</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS-1D Mark IV</model>
        <model lang="en">EOS-1D Mark IV</model>
        <mount>Canon EF</mount>
        <cropfactor>1.1</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS-1D</model>
        <model lang="en">EOS-1D</model>
        <mount>Canon EF</mount>
        <cropfactor>1.3</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS 1000D</model>
        <model lang="en">EOS 1000D</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS DIGITAL REBEL XS</model>
        <model lang="en">EOS Digital Rebel XS</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS Kiss Digital F</model>
        <model lang="en">EOS Kiss Digital F</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS 1100D</model>
        <model lang="en">EOS 1100D</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS REBEL T3</model>
        <model lang="en">EOS Rebel T3</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS Kiss X50</model>
        <model lang="en">EOS Kiss X50</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS 300D DIGITAL</model>
        <model lang="en">EOS 300D</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS DIGITAL REBEL</model>
        <model lang="en">EOS Digital REBEL</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS Kiss Digital</model>
        <model lang="en">EOS Kiss Digital</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS 350D DIGITAL</model>
        <model lang="en">EOS 350D</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS DIGITAL REBEL XT</model>
        <model lang="en">EOS Digital Rebel XT</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS Kiss Digital N</model>
        <model lang="en">EOS Kiss Digital N</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS 400D DIGITAL</model>
        <model lang="en">EOS 400D</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS DIGITAL REBEL XTi</model>
        <model lang="en">EOS Digital Rebel XTi</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS Kiss Digital X</model>
        <model lang="en">EOS Kiss Digital X</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS 450D</model>
        <model lang="en">EOS 450D</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS DIGITAL REBEL T3</model>
        <model lang="en">EOS Digital Rebel T3</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS DIGITAL REBEL XSi</model>
        <model lang="en">EOS Digital Rebel XSi</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS Kiss Digital X2</model>
        <model lang="en">EOS Kiss Digital X2</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS 500D</model>
        <model lang="en">EOS 500D</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS REBEL T1i</model>
        <model lang="en">EOS Rebel T1i</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS Kiss X3</model>
        <model lang="en">EOS Kiss X3</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS 550D</model>
        <model lang="en">EOS 550D</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS REBEL T2i</model>
        <model lang="en">EOS Rebel T2i</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS Kiss X4</model>
        <model lang="en">EOS Kiss X4</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS 600D</model>
        <model lang="en">EOS 600D</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS REBEL T3i</model>
        <model lang="en">EOS Rebel T3i</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS Kiss X5</model>
        <model lang="en">EOS Kiss X5</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS 650D</model>
        <model lang="en">EOS 650D</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS REBEL T4i</model>
        <model lang="en">EOS Rebel T4i</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS Kiss X6i</model>
        <model lang="en">EOS Kiss X6i</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS 7D</model>
        <model lang="en">EOS 7D</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS 60D</model>
        <model lang="en">EOS 60D</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS 60D</model>
        <model lang="en">EOS 60D</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS 50D</model>
        <model lang="en">EOS 50D</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS 40D</model>
        <model lang="en">EOS 40D</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS 30D</model>
        <model lang="en">EOS 30D</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS 20D</model>
        <model lang="en">EOS 20D</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS 10D</model>
        <model lang="en">EOS 10D</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS D60</model>
        <model lang="en">EOS D60</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>Canon EOS D30</model>
        <model lang="en">EOS D30</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <camera>
        <maker>Canon</maker>
        <model>35mm film: full frame</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
    </camera>

    <camera>
        <maker>Kodak</maker>
        <model>DCS Pro SLR/c</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
    </camera>

    <camera>
        <maker>Kodak</maker>
        <model>DCS520C</model>
        <mount>Canon EF</mount>
        <cropfactor>1.6</cropfactor>
    </camera>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF-S 10-22mm f/3.5-4.5 USM</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="10" a="0.005371" b="-0.018303" c="0" />
            <distortion model="ptlens" focal="12" a="0.002619" b="-0.009527" c="0" />
            <distortion model="ptlens" focal="14" a="0.002896" b="-0.00705" c="0" />
            <distortion model="ptlens" focal="17" a="0.005115" b="-0.010326" c="0" />
            <distortion model="ptlens" focal="20" a="0.00512" b="-0.008414" c="0" />
            <distortion model="ptlens" focal="22" a="0.002769" b="-0.004058" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 15mm f/2.8 Fisheye</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <type>fisheye</type>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 16-35mm f/2.8L USM</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="16" a="0.023824" b="-0.058145" c="0" />
            <distortion model="ptlens" focal="17" a="0.022268" b="-0.051156" c="0" />
            <distortion model="ptlens" focal="20" a="0.020609" b="-0.044077" c="0" />
            <distortion model="ptlens" focal="22" a="0.01767" b="-0.036082" c="0" />
            <distortion model="ptlens" focal="24" a="0.016895" b="-0.032578" c="0" />
            <distortion model="ptlens" focal="26" a="0.012716" b="-0.021973" c="0" />
            <distortion model="ptlens" focal="30" a="0.010184" b="-0.016286" c="0" />
            <distortion model="ptlens" focal="33" a="0.00765" b="-0.00996" c="0" />
            <distortion model="ptlens" focal="35" a="0.007164" b="-0.010358" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 17-35mm f/2.8L USM</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="17" a="0.020618" b="-0.051946" c="0" />
            <distortion model="ptlens" focal="18" a="0.022989" b="-0.054039" c="0" />
            <distortion model="ptlens" focal="20" a="0.021786" b="-0.050249" c="0" />
            <distortion model="ptlens" focal="22" a="0.01785" b="-0.039447" c="0" />
            <distortion model="ptlens" focal="24" a="0.015392" b="-0.032541" c="0" />
            <distortion model="ptlens" focal="27" a="0.012041" b="-0.022894" c="0" />
            <distortion model="ptlens" focal="30" a="0.008656" b="-0.01427" c="0" />
            <distortion model="ptlens" focal="35" a="0.006328" b="-0.008464" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 17-40mm f/4L USM</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="17" a="0.020104" b="-0.047886" c="0" />
            <distortion model="ptlens" focal="19" a="0.016917" b="-0.039854" c="0" />
            <distortion model="ptlens" focal="20" a="0.015352" b="-0.035125" c="0" />
            <distortion model="ptlens" focal="22" a="0.01352" b="-0.027379" c="0" />
            <distortion model="ptlens" focal="24" a="0.012744" b="-0.024334" c="0" />
            <distortion model="ptlens" focal="26" a="0.012023" b="-0.02158" c="0" />
            <distortion model="ptlens" focal="28" a="0.008491" b="-0.013858" c="0" />
            <distortion model="ptlens" focal="32" a="0.007181" b="-0.008983" c="0" />
            <distortion model="ptlens" focal="35" a="0.006829" b="-0.007622" c="0" />
            <distortion model="ptlens" focal="37" a="0.006676" b="-0.007544" c="0" />
            <distortion model="ptlens" focal="40" a="0.00464" b="-0.003826" c="0" />
        </calibration>
    </lens>
    
     <!-- Lens is in database twice. 
    <lens>
        <maker>Canon</maker>
        <model>Canon EF-S 17-55mm f/2.8 IS USM</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="poly3" focal="17" k1="-0.01500" />
            <distortion model="poly3" focal="20" k1="-0.00100" />
            <distortion model="poly3" focal="24" k1="+0.00000" />
            <distortion model="poly3" focal="28" k1="+0.01000" />
            <distortion model="poly3" focal="35" k1="+0.02000" />
            <distortion model="poly3" focal="55" k1="+0.02000" />
        </calibration>
    </lens>
    -->
   
    <lens>
        <maker>Canon</maker>
        <model>Canon EF-S 17-55mm f/2.8 IS USM</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="17" a="0.0160544" b="-0.0422842" c="0.00805163" />
            <distortion model="ptlens" focal="20" a="0.0145107" b="-0.0318653" c="0.012966" />
            <distortion model="ptlens" focal="23" a="0.0132784" b="-0.0244953" c="0.0194828" />
            <distortion model="ptlens" focal="28" a="0.00120309" b="0.00979416" c="-0.00868762" />
            <distortion model="ptlens" focal="35" a="-0.000341579" b="0.0108822" c="-0.00545481" />
            <distortion model="ptlens" focal="55" a="0.00182321" b="0.00378863" c="0.00103256" />
        </calibration>
    </lens>
   
       
    <lens>
        <maker>Canon</maker>
        <model>Canon EF-S 17-85mm f/4-5.6 IS USM</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="17" a="0.021181" b="-0.055581" c="0" />
            <distortion model="ptlens" focal="20" a="0.019344" b="-0.043786" c="0" />
            <distortion model="ptlens" focal="22" a="0.015491" b="-0.026682" c="0" />
            <distortion model="ptlens" focal="28" a="0.008084" b="-0.007472" c="0" />
            <distortion model="ptlens" focal="30" a="0.005522" b="-0.001763" c="0" />
            <distortion model="ptlens" focal="35" a="0.003149" b="0.002207" c="0" />
            <distortion model="ptlens" focal="44" a="0" b="0.008269" c="0" />
            <distortion model="ptlens" focal="53" a="0" b="0.008792" c="0" />
            <distortion model="ptlens" focal="61" a="0" b="0.00738" c="0" />
            <distortion model="ptlens" focal="72" a="0" b="0.006226" c="0" />
            <distortion model="ptlens" focal="78" a="0" b="0.007095" c="0" />
            <distortion model="ptlens" focal="85" a="0" b="0.007288" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF-S 18-55mm f/3.5-5.6</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="18" a="0" b="0.003658" c="-0.04063" />
            <distortion model="ptlens" focal="21" a="0" b="0.004255" c="-0.038513" />
            <distortion model="ptlens" focal="24" a="0" b="-0.000965" c="-0.019793" />
            <distortion model="ptlens" focal="27" a="0" b="0.001701" c="-0.014516" />
            <distortion model="ptlens" focal="30" a="0" b="0.003199" c="-0.012047" />
            <distortion model="ptlens" focal="33" a="0" b="3.4e-05" c="-0.005236" />
            <distortion model="ptlens" focal="37" a="0" b="0.00556" c="-0.016032" />
            <distortion model="ptlens" focal="41" a="0" b="0.001585" c="-0.007594" />
            <distortion model="ptlens" focal="45" a="0" b="0.00577" c="-0.015688" />
            <distortion model="ptlens" focal="48" a="0" b="0.001543" c="-0.003821" />
            <distortion model="ptlens" focal="53" a="0" b="-0.001301" c="0.001515" />
            <distortion model="ptlens" focal="55" a="0" b="0.000426" c="-0.001817" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF-S 18-55mm f/3.5-5.6 IS II</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="18" a="0.02504" b="-0.06883" c="0.01502" />
            <distortion model="ptlens" focal="24" a="0.0203" b="-0.06514" c="0.04768" />
            <distortion model="ptlens" focal="29" a="0.00854" b="-0.01505" c="-0.00639" />
            <distortion model="ptlens" focal="35" a="-0.01582" b="0.04918" c="-0.05313" />
            <distortion model="ptlens" focal="41" a="-0.00694" b="0.02694" c="-0.03595" />
            <distortion model="ptlens" focal="46" a="-0.01908" b="0.07131" c="-0.08927" />
            <distortion model="ptlens" focal="55" a="-0.00098" b="0.01803" c="-0.04704" />
            <tca model="poly3" focal="18" br="-0.0000920" vr="1.0002970" bb="0.0000982" vb="0.9999149"/>
            <tca model="poly3" focal="24" br="0.0000221" vr="1.0001910" bb="0.0000350" vb="0.9999440"/>
            <tca model="poly3" focal="35" br="-0.0000353" vr="1.0002159" bb="0.0000109" vb="1.0000923"/>
            <tca model="poly3" focal="55" br="-0.0000040" vr="0.9999122" bb="0.0000987" vb="1.0002719"/>            
        </calibration>
    </lens>
    
    <lens>
        <maker>Canon</maker>
        <model>Canon EF-S 18-55mm f/3.5-5.6 III</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="18" a="0.00029" b="-0.00065" c="-0.04054" />
            <distortion model="ptlens" focal="20" a="0.00913" b="-0.024255" c="-0.02326" />
            <distortion model="ptlens" focal="21" a="0.0219" b="-0.05865" c="0.01747" />
            <distortion model="ptlens" focal="24" a="0.02945" b="-0.07112" c="0.02358" />
            <distortion model="ptlens" focal="27" a="-0.00225" b="0.00421" c="-0.02519" />
            <distortion model="ptlens" focal="28" a="0.00888" b="-0.02851" c="0.00655" />
            <distortion model="ptlens" focal="29" a="-0.00423" b="0.01103" c="-0.02517" />
            <distortion model="ptlens" focal="30" a="-0.02064" b="0.0652" c="-0.07411" />
            <distortion model="ptlens" focal="33" a="0.00378" b="-0.00627" c="-0.00869" />
            <distortion model="ptlens" focal="34" a="0.00579" b="-0.01787" c="0.00697" />
            <distortion model="ptlens" focal="36" a="0.00139" b="0.00016" c="-0.00891" />
            <distortion model="ptlens" focal="37" a="-0.01074" b="0.01955" c="0.00324" />
            <distortion model="ptlens" focal="40" a="-0.00209" b="-0.00426" c="-0.01103" />
            <distortion model="ptlens" focal="41" a="-0.00308" b="0.01968" c="-0.03451" />
            <distortion model="ptlens" focal="43" a="-0.00935" b="0.02372" c="-0.03174" />
            <distortion model="ptlens" focal="44" a="0.00283" b="0.00211" c="-0.01406" />
            <distortion model="ptlens" focal="47" a="-0.01247" b="0.03006" c="-0.01156" />
            <distortion model="ptlens" focal="49" a="0.00841" b="-0.04436" c="0.06329" />
            <distortion model="ptlens" focal="53" a="0.00359" b="-0.01264" c="0.01563" />
            <distortion model="ptlens" focal="55" a="-0.0117" b="0.03217" c="-0.02069" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 24-70mm f/2.8L USM</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="24" a="0.015298" b="-0.039413" c="0" />
            <distortion model="ptlens" focal="27" a="0.014041" b="-0.034436" c="0" />
            <distortion model="ptlens" focal="30" a="0.013341" b="-0.031051" c="0" />
            <distortion model="ptlens" focal="34" a="0.006539" b="-0.01539" c="0" />
            <distortion model="ptlens" focal="38" a="0.003138" b="-0.007742" c="0" />
            <distortion model="ptlens" focal="43" a="0" b="0.000233" c="0" />
            <distortion model="ptlens" focal="48" a="0" b="0.00151" c="0" />
            <distortion model="ptlens" focal="55" a="0" b="0.003988" c="0" />
            <distortion model="ptlens" focal="64" a="0" b="0.005787" c="0" />
            <distortion model="ptlens" focal="70" a="0" b="0.006294" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 24-85mm f/3.5-4.5 USM</model>
        <mount>Canon EF</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="24" a="0.005763" b="-0.022311" c="0" />
            <distortion model="ptlens" focal="28" a="0.002537" b="-0.01074" c="0" />
            <distortion model="ptlens" focal="35" a="0" b="0" c="0" />
            <distortion model="ptlens" focal="48" a="0" b="0.004254" c="0" />
            <distortion model="ptlens" focal="70" a="0" b="0.005312" c="0" />
            <distortion model="ptlens" focal="85" a="0" b="0.004512" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 28-70mm f/2.8L</model>
        <mount>Canon EF</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="28" a="-0.001744" b="0.000657" c="0" />
            <distortion model="ptlens" focal="32" a="0.003058" b="-0.013232" c="0" />
            <distortion model="ptlens" focal="35" a="-0.004696" b="0.007063" c="0" />
            <distortion model="ptlens" focal="39" a="0.00011" b="-0.002166" c="0" />
            <distortion model="ptlens" focal="44" a="-0.001271" b="0.001861" c="0" />
            <distortion model="ptlens" focal="50" a="-0.006466" b="0.014612" c="0" />
            <distortion model="ptlens" focal="60" a="-0.001227" b="0.003723" c="0" />
            <distortion model="ptlens" focal="70" a="-0.001929" b="0.005136" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 24-105mm f/4L IS USM</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="24" a="0.017263" b="-0.049244" c="0" />
            <distortion model="ptlens" focal="28" a="0.010878" b="-0.024454" c="0" />
            <distortion model="ptlens" focal="35" a="0.007152" b="-0.009799" c="0" />
            <distortion model="ptlens" focal="50" a="0.002502" b="0.004803" c="0" />
            <distortion model="ptlens" focal="70" a="0" b="0.009685" c="0" />
            <distortion model="ptlens" focal="88" a="0" b="0.008781" c="0" />
            <distortion model="ptlens" focal="105" a="0" b="0.009598" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 24-105mm f/4L IS USM</model>
        <mount>Canon EF</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="24" a="0.00552" b="-0.02074" c="0" />
            <distortion model="ptlens" focal="28" a="0.00396" b="-0.01457" c="0" />
            <distortion model="ptlens" focal="35" a="0.00091" b="-0.00171" c="0" />
            <distortion model="ptlens" focal="50" a="0.00077" b="0.00096" c="0" />
            <distortion model="ptlens" focal="70" a="0.0016" b="5e-05" c="0" />
            <distortion model="ptlens" focal="88" a="0.00467" b="-0.00624" c="0" />
            <distortion model="ptlens" focal="105" a="0.00797" b="-0.01307" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 28-105mm f/3.5-4.5 II USM</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="28" a="0.013305" b="-0.03973" c="0" />
            <distortion model="ptlens" focal="35" a="0.005643" b="-0.012771" c="0" />
            <distortion model="ptlens" focal="50" a="0" b="0.007781" c="0" />
            <distortion model="ptlens" focal="70" a="0" b="0.010884" c="0" />
            <distortion model="ptlens" focal="105" a="0" b="0.011749" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 28-300mm f/3.5-5.6L IS USM</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="28" a="0.013512" b="-0.044163" c="0" />
            <distortion model="ptlens" focal="35" a="0.008844" b="-0.01773" c="0" />
            <distortion model="ptlens" focal="40" a="0" b="0.008261" c="0" />
            <distortion model="ptlens" focal="60" a="0" b="0.012093" c="0" />
            <distortion model="ptlens" focal="70" a="0" b="0.012516" c="0" />
            <distortion model="ptlens" focal="105" a="0" b="0.009065" c="0" />
            <distortion model="ptlens" focal="135" a="0" b="0.008196" c="0" />
            <distortion model="ptlens" focal="200" a="0" b="0.007773" c="0" />
            <distortion model="ptlens" focal="300" a="0" b="0.008177" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 28-135mm f/3.5-5.6 IS USM</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="28" a="0.015307" b="-0.042304" c="0" />
            <distortion model="ptlens" focal="35" a="0.009116" b="-0.020624" c="0" />
            <distortion model="ptlens" focal="41" a="0" b="0.003439" c="0" />
            <distortion model="ptlens" focal="53" a="0" b="0.008157" c="0" />
            <distortion model="ptlens" focal="60" a="0" b="0.008848" c="0" />
            <distortion model="ptlens" focal="70" a="0" b="0.009719" c="0" />
            <distortion model="ptlens" focal="85" a="0" b="0.009196" c="0" />
            <distortion model="ptlens" focal="100" a="0" b="0.008576" c="0" />
            <distortion model="ptlens" focal="117" a="0" b="0.010397" c="0" />
            <distortion model="ptlens" focal="135" a="0" b="0.010546" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 35-70mm f/3.5-4.5</model>
        <mount>Canon EF</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="35" a="0" b="-0.005023" c="0" />
            <distortion model="ptlens" focal="42" a="0" b="-0.002793" c="0" />
            <distortion model="ptlens" focal="56" a="0" b="0.000982" c="0" />
            <distortion model="ptlens" focal="70" a="0" b="0.001993" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 35-80mm f/4-5.6 III</model>
        <mount>Canon EF</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="35" a="0.003148" b="-0.013071" c="0" />
            <distortion model="ptlens" focal="40" a="0" b="-0.004903" c="0" />
            <distortion model="ptlens" focal="44" a="0" b="-0.002625" c="0" />
            <distortion model="ptlens" focal="53" a="0" b="0.000335" c="0" />
            <distortion model="ptlens" focal="65" a="0" b="0.002145" c="0" />
            <distortion model="ptlens" focal="80" a="0.00704" b="0.002809" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 35-105mm f/3.5-4.5</model>
        <mount>Canon EF</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="35" a="0.003118" b="-0.013401" c="0" />
            <distortion model="ptlens" focal="45" a="0.003039" b="-0.007423" c="0" />
            <distortion model="ptlens" focal="60" a="0.001309" b="0.000252" c="0" />
            <distortion model="ptlens" focal="82" a="0.001085" b="0.002214" c="0" />
            <distortion model="ptlens" focal="105" a="0.000575" b="0.003503" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 35-105mm f/4.5-5.6</model>
        <mount>Canon EF</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="35" a="-0.00202" b="0.00115" c="-0.00877" />
            <distortion model="ptlens" focal="48" a="0.00206" b="-0.00395" c="0.00411" />
            <distortion model="ptlens" focal="57" a="-0.00649" b="0.02493" c="-0.01898" />
            <distortion model="ptlens" focal="62" a="-0.01071" b="0.01858" c="0.00875" />
            <distortion model="ptlens" focal="68" a="-0.02787" b="0.07826" c="-0.05368" />
            <distortion model="ptlens" focal="72" a="-0.03351" b="0.12504" c="-0.14162" />
            <distortion model="ptlens" focal="76" a="0.00385" b="-0.0011" c="-0.00351" />
            <distortion model="ptlens" focal="80" a="0.01832" b="-0.05905" c="0.07657" />
            <distortion model="ptlens" focal="87" a="-0.03411" b="0.14077" c="-0.17993" />
            <distortion model="ptlens" focal="98" a="0.0103" b="-0.03257" c="0.02861" />
            <distortion model="ptlens" focal="105" a="0.03329" b="-0.012513" c="0.16021" />
        </calibration>
    </lens>
    
    <lens>
        <maker>Canon</maker>
        <model>Canon EF 35-135mm f/4-5.6 USM</model>
        <mount>Canon EF</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="35" a="0.001862" b="-0.007763" c="0" />
            <distortion model="ptlens" focal="45" a="0" b="0.001004" c="0" />
            <distortion model="ptlens" focal="65" a="0" b="0.004211" c="0" />
            <distortion model="ptlens" focal="80" a="0" b="0.004364" c="0" />
            <distortion model="ptlens" focal="91" a="0" b="0.005026" c="0" />
            <distortion model="ptlens" focal="110" a="0" b="0.005453" c="0" />
            <distortion model="ptlens" focal="135" a="0" b="0.003708" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 55-200mm f/4.5-5.6</model>
        <mount>Canon EF</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="55" a="-0.002904" b="0.003678" c="0" />
            <distortion model="ptlens" focal="65" a="-0.004584" b="0.008401" c="0" />
            <distortion model="ptlens" focal="75" a="-0.000913" b="0.001853" c="0" />
            <distortion model="ptlens" focal="88" a="-0.002182" b="0.007163" c="0" />
            <distortion model="ptlens" focal="105" a="-0.002465" b="0.008767" c="0" />
            <distortion model="ptlens" focal="130" a="-0.003219" b="0.010958" c="0" />
            <distortion model="ptlens" focal="145" a="-0.003261" b="0.011157" c="0" />
            <distortion model="ptlens" focal="160" a="-0.003477" b="0.011918" c="0" />
            <distortion model="ptlens" focal="200" a="-0.00602" b="0.017552" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 70-200mm f/2.8L IS USM</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="70" a="0" b="-0.009135" c="0" />
            <distortion model="ptlens" focal="73" a="0" b="-0.008769" c="0" />
            <distortion model="ptlens" focal="78" a="0" b="-0.006965" c="0" />
            <distortion model="ptlens" focal="80" a="0" b="-0.005047" c="0" />
            <distortion model="ptlens" focal="90" a="0" b="-0.000959" c="0" />
            <distortion model="ptlens" focal="100" a="0" b="0.00029" c="0" />
            <distortion model="ptlens" focal="115" a="0" b="0.002667" c="0" />
            <distortion model="ptlens" focal="130" a="0" b="0.004312" c="0" />
            <distortion model="ptlens" focal="145" a="0" b="0.004809" c="0" />
            <distortion model="ptlens" focal="160" a="0" b="0.005218" c="0" />
            <distortion model="ptlens" focal="170" a="0" b="0.006153" c="0" />
            <distortion model="ptlens" focal="185" a="0" b="0.006109" c="0" />
            <distortion model="ptlens" focal="200" a="0" b="0.008631" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 70-200mm f/2.8L IS USM + EF 1.4x ext</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="98" a="0" b="-0.012279" c="0" />
            <distortion model="ptlens" focal="105" a="0" b="-0.012117" c="0" />
            <distortion model="ptlens" focal="110" a="0" b="-0.011447" c="0" />
            <distortion model="ptlens" focal="120" a="0" b="-0.010878" c="0" />
            <distortion model="ptlens" focal="135" a="0" b="-0.00804" c="0" />
            <distortion model="ptlens" focal="145" a="0" b="-0.00886" c="0" />
            <distortion model="ptlens" focal="160" a="0" b="-0.00706" c="0" />
            <distortion model="ptlens" focal="185" a="0" b="-0.006693" c="0" />
            <distortion model="ptlens" focal="220" a="0" b="-0.006125" c="0" />
            <distortion model="ptlens" focal="245" a="0" b="-0.004999" c="0" />
            <distortion model="ptlens" focal="280" a="0" b="-0.004683" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 70-200mm f/4L USM</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="70" a="0" b="-0.006408" c="0" />
            <distortion model="ptlens" focal="75" a="0" b="-0.005162" c="0" />
            <distortion model="ptlens" focal="81" a="0" b="-0.003271" c="0" />
            <distortion model="ptlens" focal="94" a="0" b="0.000642" c="0" />
            <distortion model="ptlens" focal="100" a="0" b="0.002069" c="0" />
            <distortion model="ptlens" focal="109" a="0" b="0.003375" c="0" />
            <distortion model="ptlens" focal="122" a="0" b="0.004125" c="0" />
            <distortion model="ptlens" focal="135" a="0" b="0.005898" c="0" />
            <distortion model="ptlens" focal="145" a="0" b="0.006262" c="0" />
            <distortion model="ptlens" focal="159" a="0" b="0.007369" c="0" />
            <distortion model="ptlens" focal="168" a="0" b="0.008619" c="0" />
            <distortion model="ptlens" focal="184" a="0" b="0.008464" c="0" />
            <distortion model="ptlens" focal="200" a="0" b="0.008816" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 70-200mm f/4L USM + EF 1.4x ext</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="98" a="0" b="-0.011699" c="0" />
            <distortion model="ptlens" focal="109" a="0" b="-0.010575" c="0" />
            <distortion model="ptlens" focal="117" a="0" b="-0.008594" c="0" />
            <distortion model="ptlens" focal="127" a="0" b="-0.008167" c="0" />
            <distortion model="ptlens" focal="140" a="0" b="-0.007141" c="0" />
            <distortion model="ptlens" focal="158" a="0" b="-0.005869" c="0" />
            <distortion model="ptlens" focal="176" a="0" b="-0.00486" c="0" />
            <distortion model="ptlens" focal="189" a="0" b="-0.005166" c="0" />
            <distortion model="ptlens" focal="203" a="0" b="-0.004933" c="0" />
            <distortion model="ptlens" focal="222" a="0" b="-0.004657" c="0" />
            <distortion model="ptlens" focal="235" a="0" b="-0.004297" c="0" />
            <distortion model="ptlens" focal="280" a="0" b="-0.002653" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon 70-200mm f/4L IS USM</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="70" a="-0.012" b="0.037" c="-0.046" />
            <distortion model="ptlens" focal="97" a="0.008" b="-0.025" c="0.028" />
            <distortion model="ptlens" focal="127" a="0.001" b="0.004" c="-0.001" />
            <distortion model="ptlens" focal="200" a="-0.005" b="0.032" c="-0.031" />
        </calibration>
    </lens>
    
    <lens>
        <maker>Canon</maker>
        <model>Canon EF 70-300mm f/4.5-5.6 DO IS USM</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="70" a="0" b="-0.003445" c="0" />
            <distortion model="ptlens" focal="75" a="0" b="-0.001549" c="0" />
            <distortion model="ptlens" focal="100" a="0" b="0.004544" c="0" />
            <distortion model="ptlens" focal="130" a="0" b="0.009179" c="0" />
            <distortion model="ptlens" focal="150" a="0" b="0.010655" c="0" />
            <distortion model="ptlens" focal="200" a="0" b="0.010972" c="0" />
            <distortion model="ptlens" focal="230" a="0" b="0.009311" c="0" />
            <distortion model="ptlens" focal="270" a="0" b="0.011792" c="0" />
            <distortion model="ptlens" focal="300" a="0" b="0.009986" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 70-300mm f/4-5.6 IS USM</model>
        <mount>Canon EF</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="300" a="-0.00012" b="0.00556" c="-0.00398" />
            <distortion model="ptlens" focal="200" a="-0.00466" b="0.01801" c="-0.01557" />
            <distortion model="ptlens" focal="135" a="-0.00371" b="0.01433" c="-0.01464" />
            <distortion model="ptlens" focal="100" a="0" b="-0.00091" c="0" />
            <distortion model="ptlens" focal="70" a="0" b="-0.00371" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 75-300mm f/4-5.6 III</model>
        <mount>Canon EF</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="75" a="0.47796" b="-0.98871" c="0.74143" />
            <distortion model="ptlens" focal="80" a="0.73577" b="-1.35909" c="0.82695" />
            <distortion model="ptlens" focal="85" a="0.18115" b="-0.23959" c="0.18792" />
            <distortion model="ptlens" focal="90" a="0.86117" b="-1.83099" c="1.24221" />
            <distortion model="ptlens" focal="95" a="1.1097" b="-2.53267" c="1.80147" />
            <distortion model="ptlens" focal="100" a="0.69157" b="-1.62711" c="1.19887" />
            <distortion model="ptlens" focal="105" a="0.26436" b="-0.64004" c="0.49201" />
            <distortion model="ptlens" focal="110" a="0.29814" b="-0.72389" c="0.55478" />
            <distortion model="ptlens" focal="125" a="0.14326" b="-0.39549" c="0.34747" />
            <distortion model="ptlens" focal="130" a="0.06614" b="-0.16946" c="0.14396" />
            <distortion model="ptlens" focal="135" a="0.09381" b="-0.23171" c="0.18154" />
            <distortion model="ptlens" focal="140" a="0.00267" b="-0.01604" c="0.02513" />
            <distortion model="ptlens" focal="155" a="-0.00101" b="0.01422" c="-0.0204" />
            <distortion model="ptlens" focal="160" a="-0.09721" b="0.28794" c="-0.28178" />
            <distortion model="ptlens" focal="180" a="0.00049" b="-0.01582" c="0.01736" />
            <distortion model="ptlens" focal="200" a="-0.00084" b="0.01896" c="-0.01011" />
            <distortion model="ptlens" focal="240" a="0.04928" b="-0.11522" c="0.02023" />
            <distortion model="ptlens" focal="255" a="0.02046" b="-0.05515" c="0.05526" />
            <distortion model="ptlens" focal="280" a="-0.00732" b="0.01809" c="-0.00273" />
            <distortion model="ptlens" focal="300" a="-0.00709" b="0.03947" c="-0.05006" />
        </calibration>
    </lens>
    
    <lens>
        <maker>Canon</maker>
        <model>Canon EF 75-300mm f/4-5.6 IS USM</model>
        <mount>Canon EF</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="75" a="0" b="-0.004815" c="0" />
            <distortion model="ptlens" focal="100" a="0" b="-0.004914" c="0" />
            <distortion model="ptlens" focal="135" a="0" b="0.000475" c="0" />
            <distortion model="ptlens" focal="155" a="0" b="0.001105" c="0" />
            <distortion model="ptlens" focal="300" a="0" b="0.00411" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 80-200mm f/2.8L</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="80" a="0" b="-0.007253" c="0" />
            <distortion model="ptlens" focal="88" a="0" b="-0.006184" c="0" />
            <distortion model="ptlens" focal="100" a="0" b="-0.003182" c="0" />
            <distortion model="ptlens" focal="120" a="0" b="-0.000752" c="0" />
            <distortion model="ptlens" focal="140" a="0" b="0.001667" c="0" />
            <distortion model="ptlens" focal="175" a="0" b="0.003535" c="0" />
            <distortion model="ptlens" focal="200" a="0" b="0.004386" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 100-300mm f/5.6L</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="100" a="0" b="-0.001195" c="0" />
            <distortion model="ptlens" focal="123" a="0" b="0.001845" c="0" />
            <distortion model="ptlens" focal="142" a="0" b="0.00427" c="0" />
            <distortion model="ptlens" focal="173" a="0" b="0.006821" c="0" />
            <distortion model="ptlens" focal="210" a="0" b="0.008324" c="0" />
            <distortion model="ptlens" focal="250" a="0" b="0.008554" c="0" />
            <distortion model="ptlens" focal="300" a="0" b="0.009679" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 100-400mm f/4.5-5.6L IS USM</model>
        <mount>Canon EF</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="100" a="0.001543" b="-0.003547" c="0" />
            <distortion model="ptlens" focal="135" a="0.000471" b="-0.000408" c="0" />
            <distortion model="ptlens" focal="150" a="0.00022" b="0.000681" c="0" />
            <distortion model="ptlens" focal="200" a="-0.00011" b="0.00192" c="0" />
            <distortion model="ptlens" focal="250" a="0.001326" b="-0.001117" c="0" />
            <distortion model="ptlens" focal="300" a="-0.001773" b="0.005878" c="0" />
            <distortion model="ptlens" focal="350" a="0.000721" b="0.000672" c="0" />
            <distortion model="ptlens" focal="400" a="-0.000338" b="0.003752" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 20mm f/2.8 USM</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="20" a="0.018218" b="-0.040033" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 24mm f/1.4L USM</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="24" a="0.013378" b="-0.028367" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 24mm f/2.8</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="24" a="0.017412" b="-0.039315" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 28mm f/1.8</model>
        <mount>Canon EF</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="28" a="0.001175" b="-0.006534" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 28mm f/2.8</model>
        <mount>Canon EF</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="28" a="0.003003" b="-0.011213" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 35mm f/1.4L USM</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="35" a="0.007937" b="-0.021832" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 35mm f/2</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="35" a="0.007768" b="-0.018685" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 50mm f/1.4</model>
        <mount>Canon EF</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="50" a="0" b="-0.002987" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 50mm f/1.4</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="50" a="0.002615" b="-0.01123" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 50mm f/1.8</model>
        <mount>Canon EF</mount>
        <cropfactor>1.3</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="50" a="-0.00016" b="-0.003951" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 50mm f/1.8 II</model>
        <mount>Canon EF</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="50" a="0.00099" b="-0.00582" c="0.00498"/>
            <tca model="poly3" focal="50" br="-0.0000133" vr="1.0001567" bb="-0.0000082" vb="0.9999807"/>
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 50mm f/1.8 MkII</model>
        <mount>Canon EF</mount>
        <cropfactor>1.3</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="50" a="-0.00016" b="-0.003951" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF-S 60mm f/2.8 Macro</model>
        <mount>Canon EF-S</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="60" a="0" b="0" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 85mm f/1.2L USM</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="85" a="0" b="-0.00214" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 85mm f/1.8 USM</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="85" a="-0.000989" b="-0.002335" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 100mm f/2.8 USM Macro</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="100" a="0.001889" b="-0.005706" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 100mm f/2.8 Macro</model>
        <mount>Canon EF</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="100" a="-0.001558" b="0.004225" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 135mm f/2.8 Soft Focus</model>
        <mount>Canon EF</mount>
        <cropfactor>1.3</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="135" a="0.001266" b="0.001782" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF 200mm f/2.8L II USM</model>
        <mount>Canon EF</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="200" a="0" b="0.000502" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon TS-E 24mm f/3.5L</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="24" a="0.006127" b="-0.018983" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon TS-E 45mm f/2.8</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="45" a="0.00211" b="-0.007388" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon TS-E 90mm f/2.8</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="90" a="0" b="0.001333" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon EF-S 55-250 f/4-5.6 IS</model>
        <mount>Canon EF</mount>
        <cropfactor>1.6</cropfactor>
        <calibration> <!-- data gathered by Spoilerhead 2010 <spoilerhead@gmail.com> using hugin-->
            <distortion model="ptlens" focal="55" a="-0.000303056" b="-0.00581537" c="-0.00237143" /> <!-- 15 shots-->
            <distortion model="ptlens" focal="70" a="-0.000520255" b="2.86405e-05" c="0.00286934" />  <!-- 21 shots -->
            <distortion model="ptlens" focal="100" a="0.00268582" b="-0.00578304" c="0.00718748" />   <!-- 17-->
            <distortion model="ptlens" focal="135" a="0.00120309" b="0.00979416" c="-0.00868762" />    <!-- 15 -->
            <distortion model="ptlens" focal="250" a="-0.00226069" b="0.0111545" c="-0.00536676" />    <!-- 18 -->
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon 28mm f/1.8 USM</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="28" a="0.018" b="-0.048" c="0.019" />
        </calibration>
    </lens>

    <lens>
        <maker>Canon</maker>
        <model>Canon 135mm f/2.0L USM</model>
        <mount>Canon EF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="135" a="-0.007" b="0.025" c="-0.019" />
        </calibration>
    </lens>


</lensdatabase>
