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en:photo:equipment:canon-ef-50-f1.8 [2011/05/13 20:03] alex created |
en:photo:equipment:canon-ef-50-f1.8 [2011/11/10 01:31] alex [LensFun Calibration Data] |
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- | ====== Canon EF 50mm f/1.8 II Lens ====== | + | ====== Canon EF 50mm f/1.8 MkII Lens ====== |
{{:en:photo:equipment:canon-50mm-f1.8.jpg?400&direct|}} | {{:en:photo:equipment:canon-50mm-f1.8.jpg?400&direct|}} | ||
+ | |||
+ | ===== 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''. This lens did not appear to need any TCA correction anyway, interestingly enough. | ||
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+ | <code> | ||
+ | <lens> | ||
+ | <maker>Canon</maker> | ||
+ | <model>Canon EF 50mm f/1.8 MkII</model> | ||
+ | <mount>Canon EF</mount> | ||
+ | <cropfactor>1.3</cropfactor> | ||
+ | <calibration> | ||
+ | <distortion model="ptlens" focal="50" a="-0.00016" b="-0.003951" c="0" /> | ||
+ | <!-- manually selected compensation values --> | ||
+ | <tca model="linear" focal="50" kr="1.000000" kb="1.000000" /> | ||
+ | </calibration> | ||
+ | </lens> | ||
+ | </code> | ||
===== Links ===== | ===== Links ===== |