<lensdatabase>

    <lens>
        <maker>Tamron</maker>
        <model>Tamron 17-35mm f/2.8-4 Di LD</model>
        <mount>Canon EF</mount>
        <mount>Nikon F AF</mount>
        <mount>Pentax KAF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="17" a="0.023029" b="-0.056393" c="0" />
            <distortion model="ptlens" focal="18" a="0.021257" b="-0.051504" c="0" />
            <distortion model="ptlens" focal="19" a="0.018234" b="-0.043262" c="0" />
            <distortion model="ptlens" focal="20" a="0.017656" b="-0.040559" c="0" />
            <distortion model="ptlens" focal="21" a="0.015106" b="-0.033986" c="0" />
            <distortion model="ptlens" focal="22" a="0.014043" b="-0.030629" c="0" />
            <distortion model="ptlens" focal="23" a="0.014764" b="-0.030599" c="0" />
            <distortion model="ptlens" focal="24" a="0.012702" b="-0.025685" c="0" />
            <distortion model="ptlens" focal="26" a="0.010132" b="-0.019341" c="0" />
            <distortion model="ptlens" focal="28" a="0.003497" b="-0.003995" c="0" />
            <distortion model="ptlens" focal="30" a="0.002043" b="0" c="0" />
            <distortion model="ptlens" focal="32" a="0.002246" b="0" c="0" />
            <distortion model="ptlens" focal="35" a="0.002673" b="0" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Tamron</maker>
        <model>Tamron 18-200mm f/3.5-6.3 XR Di II LD</model>
        <mount>Canon EF</mount>
        <mount>Nikon F AF</mount>
        <mount>Pentax KAF</mount>
        <mount>Sony Alpha</mount>
        <cropfactor>1.5</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="18" a="0.01364" b="-0.042157" c="0" />
            <distortion model="ptlens" focal="28" a="0.010678" b="-0.016742" c="0" />
            <distortion model="ptlens" focal="35" a="0.009558" b="-0.008863" c="0" />
            <distortion model="ptlens" focal="50" a="0" b="0.011197" c="0" />
            <distortion model="ptlens" focal="72" a="0" b="0.010552" c="0" />
            <distortion model="ptlens" focal="102" a="0" b="0.007166" c="0" />
            <distortion model="ptlens" focal="135" a="0" b="0.007026" c="0" />
            <distortion model="ptlens" focal="150" a="0" b="0.006778" c="0" />
            <distortion model="ptlens" focal="200" a="0" b="0.006016" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Tamron</maker>
        <model>Tamron 18-200mm f/3.5-6.3 XR Di II LD</model>
        <mount>Canon EF</mount>
        <mount>Nikon F AF</mount>
        <mount>Pentax KAF</mount>
        <mount>Sony Alpha</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="18" a="0.01757" b="-0.052885" c="0" />
            <distortion model="ptlens" focal="25" a="0.007578" b="-0.014077" c="0" />
            <distortion model="ptlens" focal="31" a="0.004963" b="-0.001934" c="0" />
            <distortion model="ptlens" focal="38" a="0" b="0.010127" c="0" />
            <distortion model="ptlens" focal="54" a="0" b="0.010971" c="0" />
            <distortion model="ptlens" focal="73" a="0" b="0.010296" c="0" />
            <distortion model="ptlens" focal="102" a="0" b="0.008059" c="0" />
            <distortion model="ptlens" focal="125" a="0" b="0.007314" c="0" />
            <distortion model="ptlens" focal="149" a="0" b="0.007285" c="0" />
            <distortion model="ptlens" focal="200" a="0" b="0.005942" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Tamron</maker>
        <model>Tamron 19-35mm f/3.5-4.5</model>
        <mount>Canon EF</mount>
        <mount>Nikon F AF</mount>
        <mount>Pentax KAF</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="19" a="0.013926" b="-0.041094" c="0" />
            <distortion model="ptlens" focal="24" a="0.005657" b="-0.020982" c="0" />
            <distortion model="ptlens" focal="27" a="0.003315" b="-0.014095" c="0" />
            <distortion model="ptlens" focal="35" a="0.004475" b="-0.013489" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Tamron</maker>
        <model>Tamron 24-135mm f/3.5-5.6 SP AD</model>
        <mount>Canon EF</mount>
        <mount>Nikon F AF</mount>
        <mount>Pentax KAF</mount>
        <cropfactor>1.6</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="24" a="0.004951" b="-0.019509" c="0" />
            <distortion model="ptlens" focal="28" a="0.002141" b="-0.010335" c="0" />
            <distortion model="ptlens" focal="35" a="0.001649" b="-0.003387" c="0" />
            <distortion model="ptlens" focal="41" a="0" b="0.002775" c="0" />
            <distortion model="ptlens" focal="52" a="0" b="0.00443" c="0" />
            <distortion model="ptlens" focal="62" a="0" b="0.004818" c="0" />
            <distortion model="ptlens" focal="74" a="0" b="0.004729" c="0" />
            <distortion model="ptlens" focal="85" a="0" b="0.00486" c="0" />
            <distortion model="ptlens" focal="99" a="0" b="0.005128" c="0" />
            <distortion model="ptlens" focal="135" a="0" b="0.004635" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Tamron</maker>
        <model>Tamron 28-75mm f/2.8 XR Di</model>
        <mount>Canon EF</mount>
        <mount>Nikon F AF</mount>
        <mount>Pentax KAF</mount>
        <mount>Sony Alpha</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="28" a="0.01469" b="-0.034774" c="0" />
            <distortion model="ptlens" focal="30" a="0.012441" b="-0.026997" c="0" />
            <distortion model="ptlens" focal="35" a="0.009958" b="-0.018577" c="0" />
            <distortion model="ptlens" focal="50" a="0" b="0.005421" c="0" />
            <distortion model="ptlens" focal="60" a="0" b="0.00752" c="0" />
            <distortion model="ptlens" focal="75" a="0" b="0.007321" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Tamron</maker>
        <model>Tamron 28-105mm f/2.8 SP LD IF</model>
        <mount>Canon EF</mount>
        <mount>Nikon F AF</mount>
        <mount>Pentax KAF</mount>
        <cropfactor>1.0</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="28" a="0.020983" b="-0.054749" c="0" />
            <distortion model="ptlens" focal="32" a="0.018015" b="-0.042871" c="0" />
            <distortion model="ptlens" focal="35" a="0.01094" b="-0.02352" c="0" />
            <distortion model="ptlens" focal="39" a="0.010993" b="-0.016341" c="0" />
            <distortion model="ptlens" focal="44" a="0.007493" b="-0.007606" c="0" />
            <distortion model="ptlens" focal="63" a="0.002757" b="0.006995" c="0" />
            <distortion model="ptlens" focal="75" a="0" b="0.012653" c="0" />
            <distortion model="ptlens" focal="93" a="0" b="0.011546" c="0" />
            <distortion model="ptlens" focal="105" a="0" b="0.012148" c="0" />
        </calibration>
    </lens>

    <lens>
        <maker>Tamron</maker>
        <model>Tamron 28-300mm f/3.5-6.3 XR Di LD</model>
        <mount>Canon EF</mount>
        <mount>Nikon F AF</mount>
        <mount>Pentax KAF</mount>
        <mount>Sony Alpha</mount>
        <cropfactor>1.5</cropfactor>
        <calibration>
            <distortion model="ptlens" focal="30" a="-0.00171" b="-0.003088" c="0" />
            <distortion model="ptlens" focal="38" a="0" b="-0.000956" c="0" />
            <distortion model="ptlens" focal="50" a="0" b="0.003328" c="0" />
            <distortion model="ptlens" focal="78" a="0" b="0.005468" c="0" />
            <distortion model="ptlens" focal="100" a="0" b="0.004829" c="0" />
            <distortion model="ptlens" focal="135" a="0" b="0.005605" c="0" />
            <distortion model="ptlens" focal="220" a="0" b="0.006124" c="0" />
            <distortion model="ptlens" focal="300" a="0" b="0.006507" c="0" />
        </calibration>
    </lens>

</lensdatabase>
