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/usr/share/lensfun/version_1/slr-samyang.xml is in liblensfun-data-v1 0.3.2-4.

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The actual contents of the file can be viewed below.

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<lensdatabase version="1">
    <lens>
        <maker>Samyang</maker>
        <model>Samyang 8mm f/3.5 Fish-Eye CS</model>
        <model lang="de">Samyang 8mm f/3.5 Fischauge CS</model>
        <mount>Pentax KAF</mount>
        <mount>Canon EF</mount>
        <mount>Nikon F AI</mount>
        <mount>Fujifilm X</mount>
        <mount>Sony Alpha</mount>
        <mount>Sony E</mount>
        <mount>4/3 System</mount>
        <mount>Micro 4/3 System</mount>
        <mount>Samsung NX</mount>
        <cropfactor>1.534</cropfactor>
        <type>stereographic</type>
        <calibration>
            <!-- Taken with some APS-C Pentax probably. -->
            <tca model="poly3" focal="8" br="-0.0007764" cr="0.0013798" vr="1.0000228" 
                                         bb="-0.0002711" cb="0.0008531" vb="0.9998496" />
            <!-- Taken with Nikon D7100 -->
            <distortion model="ptlens" focal="8" a="0.04098" b="-0.15413" c="0.11977" />
        </calibration>
    </lens>

    <lens>
        <maker>Samyang</maker>
        <!-- The "AE" is actually only on the Nikon variant.  It should be
             added as an alias rather than a merged lens model name. -->
        <model>Samyang 14mm f/2.8 AE ED AS IF UMC</model>
        <mount>Pentax KAF</mount>
        <mount>Canon EF</mount>
        <mount>Nikon F AI</mount>
        <mount>Fujifilm X</mount>
        <mount>Sony Alpha</mount>
        <mount>Sony E</mount>
        <mount>4/3 System</mount>
        <mount>Micro 4/3 System</mount>
        <mount>Samsung NX</mount>
        <mount>Nikon CX</mount>
        <mount>Canon EF-M</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="14" a="0.04015" b="-0.07043" c="-0.05466" />
            <tca model="poly3" focal="14" br="0.0000198" vr="0.9999690" bb="-0.0001334" vb="1.0003226" />
        </calibration>
    </lens>

    <lens>
        <maker>Samyang</maker>
        <!-- The "AE" is actually only on the Nikon variant.  It should be
             added as an alias rather than a merged lens model name. -->
        <model>Samyang 14mm f/2.8 AE ED AS IF UMC</model>
        <mount>Pentax KAF</mount>
        <mount>Canon EF</mount>
        <mount>Nikon F AI</mount>
        <mount>Fujifilm X</mount>
        <mount>Sony Alpha</mount>
        <mount>Sony E</mount>
        <mount>4/3 System</mount>
        <mount>Micro 4/3 System</mount>
        <mount>Samsung NX</mount>
        <mount>Nikon CX</mount>
        <mount>Canon EF-M</mount>
        <cropfactor>1.523</cropfactor>
        <calibration>
            <!-- Taken with Sony A77 -->
            <distortion model="ptlens" focal="14" a="0.01031" b="-0.02759" c="-0.0351" />
            <tca model="poly3" focal="14" br="0.0000642" vr="0.9999130" bb="-0.0001012" vb="1.0003675" />
            <vignetting model="pa" focal="14" aperture="2.8" distance="10" k1="-1.1454" k2="1.0122" k3="-0.4352" />
            <vignetting model="pa" focal="14" aperture="2.8" distance="1000" k1="-1.1454" k2="1.0122" k3="-0.4352" />
            <vignetting model="pa" focal="14" aperture="4" distance="10" k1="-0.2347" k2="-0.0941" k3="-0.0002" />
            <vignetting model="pa" focal="14" aperture="4" distance="1000" k1="-0.2347" k2="-0.0941" k3="-0.0002" />
            <vignetting model="pa" focal="14" aperture="5.6" distance="10" k1="-0.2615" k2="0.0072" k3="0.0062" />
            <vignetting model="pa" focal="14" aperture="5.6" distance="1000" k1="-0.2615" k2="0.0072" k3="0.0062" />
            <vignetting model="pa" focal="14" aperture="22" distance="10" k1="-0.2733" k2="0.0338" k3="-0.0093" />
            <vignetting model="pa" focal="14" aperture="22" distance="1000" k1="-0.2733" k2="0.0338" k3="-0.0093" />
        </calibration>
    </lens>

    <lens>
        <maker>Samyang</maker>
        <model>Samyang 500mm f/6.3 MC IF Mirror Lens</model>
        <model lang="de">Samyang 500mm f/6.3 MC IF Spiegelobjektiv</model>
        <mount>T2</mount>
        <focal value="500" />
        <aperture value="6.3" />
        <cropfactor>1.534</cropfactor>
        <calibration>
            <!-- Taken with NEX-7 -->
            <distortion model="poly3" focal="500" k1="0" />
            <tca model="linear" focal="500" kr="1" kb="1" />
            <vignetting model="pa" focal="500" aperture="6.3" distance="10" k1="-0.7756" k2="0.8291" k3="-0.3723" />
            <vignetting model="pa" focal="500" aperture="6.3" distance="1000" k1="-0.7756" k2="0.8291" k3="-0.3723" />
        </calibration>
    </lens>

    <lens>
        <maker>Samyang</maker>
        <model>Samyang 35mm f/1.4 AS UMC</model>
        <!-- This model is really only available for Nikon.  For the other
             brands, the 35/1.4 may have different characteristics. -->
        <mount>Nikon F AI</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taken with Nikon D800 -->
            <distortion model="ptlens" focal="35" a="0.00331" b="-0.0171" c="0.00274" />
        </calibration>
    </lens>

    <lens>
        <maker>Samyang</maker>
        <model>Samyang T-S 24mm f/3.5 ED AS UMC</model>
        <mount>Nikon F AI</mount>
        <mount>Canon EF</mount>
        <mount>Sony Alpha</mount>
        <mount>Sony E</mount>
        <mount>Pentax KAF</mount>
        <cropfactor>1</cropfactor>
        <calibration>
            <!-- Taken with D800 -->
            <!-- No shift, no tilt. -->
            <distortion model="ptlens" focal="24" a="-0.004" b="0.007" c="-0.02" />
        </calibration>
    </lens>

<lens>
    <maker>Samyang</maker>
    <model>Samyang 12mm f/2.8 Fish-Eye ED AS NCS</model>
    <model lang="de">Samyang 12mm f/2.8 Fischauge ED AS NCS</model>
    <mount>Nikon F AI</mount>
    <mount>Canon EF</mount>
    <mount>Sony E</mount>
    <cropfactor>1</cropfactor>
    <type>stereographic</type>
    <calibration>
        <!-- Taken with D800 -->
        <distortion model="ptlens" focal="12" a="a=-0.000331804" b="-0.00911417" c="-0.044237" />
        <vignetting model="pa" focal="12" aperture="2.8" distance="10" k1="-0.90717" k2="0.58477" k3="-0.2198" />
        <vignetting model="pa" focal="12" aperture="2.8" distance="1000" k1="-0.90717" k2="0.58477" k3="-0.2198" />
        <vignetting model="pa" focal="12" aperture="4.0" distance="10" k1="-0.17101" k2="-0.54574" k3="0.3056" />
        <vignetting model="pa" focal="12" aperture="4.0" distance="1000" k1="-0.17101" k2="-0.54574" k3="0.3056" />
        <vignetting model="pa" focal="12" aperture="5.6" distance="10" k1="-0.1978" k2="-0.03729" k3="-0.11743" />
        <vignetting model="pa" focal="12" aperture="5.6" distance="1000" k1="-0.1978" k2="-0.03729" k3="-0.11743" />
        <vignetting model="pa" focal="12" aperture="8.0" distance="10" k1="-0.18295" k2="-0.09272" k3="0.03547" />
        <vignetting model="pa" focal="12" aperture="8.0" distance="1000" k1="-0.18295" k2="-0.09272" k3="0.03547" />
    </calibration>
</lens>

    <lens>
        <maker>Samyang</maker>
        <model>Samyang 35mm T1.5 Cine Lens</model>
        <mount>Canon EF</mount>
        <cropfactor>1.620</cropfactor>
        <calibration>
            <!-- Taken with Canon 7D -->
            <distortion model="poly3" focal="35" k1="-0.00449" />
        </calibration>
    </lens>

</lensdatabase>