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en:photo:equipment:canon-efs-10-22 [2011/02/13 12:23] alex [Links] |
en:photo:equipment:canon-efs-10-22 [2011/11/10 01:30] (current) alex [LensFun Calibration Data] |
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| + | ===== LensFun Calibration Data ===== | ||
| + | |||
| + | This is my [[http://lensfun.berlios.de/|LensFun]] entry for this lens. The distortion values listed are the default values that are included with the library. Unfortunately, following the [[http://lensfun.berlios.de/lens-calibration/lens-calibration.html|lens calibration guide]], I was unable to get ''tca_correct'' to output anything meaningful. Most of the values were far off the scale that ufraw could deal with (ufraw/lensfun wants +/- 0.01 but I was geting +/- 0.5 or more). I just ended up manually selecting values for first order correction, producing a much better result than I could get from ''tca_correct''. | ||
| + | |||
| + | <code> | ||
| + | <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" /> | ||
| + | <!-- manually selected compensation values --> | ||
| + | <tca model="linear" focal="10" kr="1.000300" kb="1.000700" /> | ||
| + | <tca model="linear" focal="12" kr="1.000200" kb="1.000600" /> | ||
| + | <tca model="linear" focal="14" kr="1.000200" kb="1.000600" /> | ||
| + | <tca model="linear" focal="17" kr="1.000200" kb="1.000500" /> | ||
| + | <tca model="linear" focal="20" kr="1.000200" kb="1.000400" /> | ||
| + | <tca model="linear" focal="22" kr="1.000200" kb="1.000400" /> | ||
| + | </calibration> | ||
| + | </lens> | ||
| + | </code> | ||
| ===== Links ===== | ===== Links ===== | ||