<lensdatabase>

    <lens>
        <maker>Tokina</maker>
        <model>Tokina 12-24mm f/4 AT-X 124 AF PRO DX</model>
        <mount>Canon EF</mount>
        <mount>Nikon AF</mount>
        <cropfactor>1.5</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="12" a="-0.005227" b="0.0018" c="0" />
            <distortion model="ptlens" focal="14" a="-0.003321" b="0.00043" c="0" />
            <distortion model="ptlens" focal="15" a="-0.002362" b="0.00112" c="0" />
            <distortion model="ptlens" focal="17" a="-0.001493" b="0.000502" c="0" />
            <distortion model="ptlens" focal="19" a="-0.000691" b="0.000121" c="0" />
            <distortion model="ptlens" focal="22" a="-0.000208" b="-0.000207" c="0" />
            <distortion model="ptlens" focal="24" a="0" b="0" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Tokina</maker>
        <model>Tokina 19-35mm f/3.5-4.5 AF 193</model>
        <mount>Canon EF</mount>
        <mount>Nikon AF</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="19" a="0" b="-0.005476" c="-0.022162" />
            <distortion model="ptlens" focal="22" a="0" b="-0.003238" c="-0.017549" />
            <distortion model="ptlens" focal="24" a="0" b="-0.005132" c="-0.0082" />
            <distortion model="ptlens" focal="27" a="0" b="-0.004119" c="-0.006452" />
            <distortion model="ptlens" focal="29" a="0" b="-0.004177" c="-0.003541" />
            <distortion model="ptlens" focal="31" a="0" b="-0.002338" c="-0.006455" />
            <distortion model="ptlens" focal="33" a="0" b="-0.002642" c="-0.006101" />
            <distortion model="ptlens" focal="35" a="0" b="-0.000829" c="-0.007504" />
        </calibration>
    </lens>

    <lens>
        <maker>Tokina</maker>
        <model>Tokina 28-70mm f/2.8 AT-X 287 PRO SV</model>
        <mount>Canon EF</mount>
        <mount>Nikon AF</mount>
        <mount>Pentax KAF</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="28" a="0" b="-0.006412" c="0" />
            <distortion model="ptlens" focal="30" a="0" b="-0.005104" c="0" />
            <distortion model="ptlens" focal="35" a="0" b="-0.00295" c="0" />
            <distortion model="ptlens" focal="42" a="0" b="0.000202" c="0" />
            <distortion model="ptlens" focal="56" a="0" b="0.002091" c="0" />
            <distortion model="ptlens" focal="70" a="0" b="0.003103" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Tokina</maker>
        <model>Tokina 17mm f/3.5 AT-X AF PRO</model>
        <mount>Canon EF</mount>
        <mount>Nikon AF</mount>
        <cropfactor>1.5</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="17" a="0" b="-0.012125" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Tokina</maker>
        <model>Tokina 17mm f/3.5 AT-X AF PRO</model>
        <mount>Canon EF</mount>
        <mount>Nikon AF</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="17" a="0" b="-0.004083" c="-0.015672" />
        </calibration>
    </lens>

</lensdatabase>
