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Thread Contributor: JacoTuxCaractérisation du Fujinon XF 16-80 mm f/4 R OIS WR
#1
Ce récent objectif Fujifilm n'étant pas dans la base de données lensfun j'en fournis ici une première caractérisation.
Elle est loin d'être optimum mais la distorsion est plutôt bien corrigée, c'est le défaut principal de l'objectif, ça dépannera en attendant mieux.

Voici le code du fichier en question.

Code :
<lensdatabase>
    <lens>
        <maker>Fujifilm</maker>
        <model>XF16-80mmF4 R OIS WR</model>
        <mount>Fujifilm X</mount>
        <cropfactor>1.529</cropfactor>
        <calibration>
            <!--Taken with X-E3-->
            <distortion model="ptlens" focal="16.0" a="0.02303" b="-0.09736" c="0.05938" />
            <distortion model="ptlens" focal="18.4" a="0.01143" b="-0.03688" c="0.01458" />
            <distortion model="ptlens" focal="22.3" a="0.00608" b="-0.00913" c="0.01344" />
            <distortion model="ptlens" focal="27.5" a="0.01207" b="-0.03286" c="0.05400" />
            <distortion model="ptlens" focal="34.2" a="0.00904" b="-0.01713" c="0.03156" />
            <distortion model="ptlens" focal="41.1" a="0.00471" b="-0.00677" c="0.02893" />
            <distortion model="ptlens" focal="50.5" a="-0.01018" b="0.04099" c="-0.02268" />
            <distortion model="ptlens" focal="58.6" a="-0.01116" b="0.04825" c="-0.02146" />
            <distortion model="ptlens" focal="67.5" a="-0.01353" b="0.05086" c="-0.02142" />
            <distortion model="ptlens" focal="80.0" a="-0.01590" b="0.05348" c="-0.02139" />
<!---->
            <tca model="poly3" focal="16.0" vr="1.0008762" vb="0.9997098"/>        
        <tca model="poly3" focal="18.4" vr="1.0004810" vb="0.9996964" />
        <tca model="poly3" focal="22.3" vr="1.0005052" vb="0.9996875" />
        <tca model="poly3" focal="27.5" vr="1.0003077" vb="0.9997882" />
        <tca model="poly3" focal="34.2" vr="1.0003790" vb="0.9996834" />
        <tca model="poly3" focal="41.1" vr="1.0001337" vb="0.9998586" />
        <tca model="poly3" focal="50.5" vr="1.0001071" vb="0.9996886" />
        <tca model="poly3" focal="58.6" vr="0.9999842" vb="0.9997794" />
        <tca model="poly3" focal="67.5" vr="0.9997219" vb="0.9999391" />
        <tca model="poly3" focal="80.0" vr="0.9991037" vb="0.9999266" />
<!---->
            <vignetting model="pa" focal="16.0" aperture="4.0"  distance="1000" k1="-0.495" k2="1.514" k3="-1.681" />
            <vignetting model="pa" focal="16.0" aperture="5.7"  distance="1000" k1="-0.541" k2="1.630" k3="-1.627" />
            <vignetting model="pa" focal="16.0" aperture="8.0"  distance="1000" k1="-0.661" k2="1.962" k3="-1.844" />
            <vignetting model="pa" focal="16.0" aperture="10.9" distance="1000" k1="-0.633" k2="1.436" k3="-1.247" />
            <vignetting model="pa" focal="16.0" aperture="16.0" distance="1000" k1="-0.747" k2="1.812" k3="-1.668" />
            <vignetting model="pa" focal="16.0" aperture="21.9" distance="1000" k1="-0.743" k2="2.118" k3="-1.837" />
<!---->
            <vignetting model="pa" focal="18.4" aperture="4.0"  distance="1000" k1="-0.687" k2="1.695" k3="-1.637" />
            <vignetting model="pa" focal="18.4" aperture="5.7"  distance="1000" k1="-0.807" k2="2.202" k3="-1.939" />
            <vignetting model="pa" focal="18.4" aperture="8.0"  distance="1000" k1="-0.911" k2="2.346" k3="-1.907" />
            <vignetting model="pa" focal="18.4" aperture="10.9" distance="1000" k1="-1.028" k2="2.584" k3="-2.032" />
            <vignetting model="pa" focal="18.4" aperture="16.0" distance="1000" k1="-0.965" k2="2.449" k3="-1.949" />
            <vignetting model="pa" focal="18.4" aperture="21.9" distance="1000" k1="-0.850" k2="2.233" k3="-1.888" />
<!---->
            <vignetting model="pa" focal="22.3" aperture="4.0"  distance="1000" k1="-0.966" k2="2.704" k3="-2.265" />
            <vignetting model="pa" focal="22.3" aperture="5.7"  distance="1000" k1="-1.073" k2="2.764" k3="-2.160" />
            <vignetting model="pa" focal="22.3" aperture="8.0"  distance="1000" k1="-1.044" k2="2.612" k3="-2.022" />
            <vignetting model="pa" focal="22.3" aperture="10.9" distance="1000" k1="-1.006" k2="2.508" k3="-1.939" />
            <vignetting model="pa" focal="22.3" aperture="16.0" distance="1000" k1="-1.080" k2="2.754" k3="-2.135" />
            <vignetting model="pa" focal="22.3" aperture="21.9" distance="1000" k1="-0.618" k2="1.696" k3="-1.714" />
<!---->
            <vignetting model="pa" focal="27.5" aperture="4.0"  distance="1000" k1="-0.907" k2="2.469" k3="-2.011" />
            <vignetting model="pa" focal="27.5" aperture="5.7"  distance="1000" k1="-1.106" k2="2.910" k3="-2.235" />
            <vignetting model="pa" focal="27.5" aperture="8.0"  distance="1000" k1="-0.964" k2="2.420" k3="-1.837" />
            <vignetting model="pa" focal="27.5" aperture="10.9" distance="1000" k1="-0.991" k2="2.662" k3="-2.113" />
            <vignetting model="pa" focal="27.5" aperture="16.0" distance="1000" k1="-0.929" k2="2.449" k3="-1.938" />
            <vignetting model="pa" focal="27.5" aperture="21.9" distance="1000" k1="-0.753" k2="2.177" k3="-1.960" />
<!---->
            <vignetting model="pa" focal="34.2" aperture="4.0"  distance="1000" k1="-0.905" k2="2.514" k3="-1.981" />
            <vignetting model="pa" focal="34.2" aperture="5.7"  distance="1000" k1="-1.072" k2="2.833" k3="-2.175" />
            <vignetting model="pa" focal="34.2" aperture="8.0"  distance="1000" k1="-0.999" k2="2.702" k3="-2.090" />
            <vignetting model="pa" focal="34.2" aperture="10.9" distance="1000" k1="-1.007" k2="2.696" k3="-2.105" />
            <vignetting model="pa" focal="34.2" aperture="16.0" distance="1000" k1="-0.935" k2="2.493" k3="-1.965" />
            <vignetting model="pa" focal="34.2" aperture="21.9" distance="1000" k1="-1.001" k2="2.654" k3="-2.235" />
<!---->
            <vignetting model="pa" focal="41.1" aperture="4.0"  distance="1000" k1="-0.855" k2="2.227" k3="-1.790" />
            <vignetting model="pa" focal="41.1" aperture="5.7"  distance="1000" k1="-1.006" k2="2.426" k3="-1.768" />
            <vignetting model="pa" focal="41.1" aperture="8.0"  distance="1000" k1="-0.934" k2="2.338" k3="-1.784" />
            <vignetting model="pa" focal="41.1" aperture="10.9" distance="1000" k1="-0.943" k2="2.447" k3="-1.881" />
            <vignetting model="pa" focal="41.1" aperture="16.0" distance="1000" k1="-0.971" k2="2.474" k3="-1.865" />
            <vignetting model="pa" focal="41.1" aperture="21.9" distance="1000" k1="-0.970" k2="2.613" k3="-2.178" />
<!---->
            <vignetting model="pa" focal="50.5" aperture="4.0"  distance="1000" k1="-0.885" k2="2.439" k3="-1.910" />
            <vignetting model="pa" focal="50.5" aperture="5.7"  distance="1000" k1="-0.623" k2="1.675" k3="-1.300" />
            <vignetting model="pa" focal="50.5" aperture="8.0"  distance="1000" k1="-0.674" k2="1.851" k3="-1.409" />
            <vignetting model="pa" focal="50.5" aperture="10.9" distance="1000" k1="-0.727" k2="1.859" k3="-1.423" />
            <vignetting model="pa" focal="50.5" aperture="16.0" distance="1000" k1="-0.772" k2="2.022" k3="-1.541" />
            <vignetting model="pa" focal="50.5" aperture="21.9" distance="1000" k1="-1.052" k2="2.613" k3="-2.125" />
<!---->
            <vignetting model="pa" focal="58.6" aperture="4.0"  distance="1000" k1="-0.589" k2="1.614" k3="-1.393" />
            <vignetting model="pa" focal="58.6" aperture="5.7"  distance="1000" k1="-0.788" k2="1.806" k3="-1.330" />
            <vignetting model="pa" focal="58.6" aperture="8.0"  distance="1000" k1="-0.750" k2="1.973" k3="-1.524" />
            <vignetting model="pa" focal="58.6" aperture="10.9" distance="1000" k1="-0.704" k2="1.700" k3="-1.297" />
            <vignetting model="pa" focal="58.6" aperture="16.0" distance="1000" k1="-0.712" k2="1.619" k3="-1.239" />
            <vignetting model="pa" focal="58.6" aperture="21.9" distance="1000" k1="-1.142" k2="2.823" k3="-2.257" />
<!---->
            <vignetting model="pa" focal="67.5" aperture="4.0"  distance="1000" k1="-0.529" k2="1.482" k3="-1.329" />
            <vignetting model="pa" focal="67.5" aperture="5.7"  distance="1000" k1="-0.700" k2="1.708" k3="-1.265" />
            <vignetting model="pa" focal="67.5" aperture="8.0"  distance="1000" k1="-0.885" k2="1.993" k3="-1.368" />
            <vignetting model="pa" focal="67.5" aperture="10.9" distance="1000" k1="-0.669" k2="1.627" k3="-1.250" />
            <vignetting model="pa" focal="67.5" aperture="16.0" distance="1000" k1="-0.667" k2="1.629" k3="-1.246" />
            <vignetting model="pa" focal="67.5" aperture="21.9" distance="1000" k1="-0.526" k2="1.701" k3="-1.487" />
<!--
            <vignetting model="pa" focal="80.0" aperture="4.0"  distance="1000" k1="0" k2="0" k3="0" />
            <vignetting model="pa" focal="80.0" aperture="5.7"  distance="1000" k1="0" k2="0" k3="0" />
            <vignetting model="pa" focal="80.0" aperture="8.0"  distance="1000" k1="0" k2="0" k3="0" />
            <vignetting model="pa" focal="80.0" aperture="10.9" distance="1000" k1="0" k2="0" k3="0" />
            <vignetting model="pa" focal="80.0" aperture="16.0" distance="1000" k1="0" k2="0" k3="0" />
            <vignetting model="pa" focal="80.0" aperture="21.9" distance="1000" k1="0" k2="0" k3="0" />
-->
          </calibration>
    </lens>
</lensdatabase

Pour essayer ou en profiter copier/coller le code ci-dessus dans un fichier XF16-80mmF4.xml et à placer dans $HOME/.local/share/lensfun.
On peut trouver quelques raw d'exemple ici.
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