Canon EF 50mm f/1.8 MkII Lens
LensFun Calibration Data
This is my LensFun entry for this lens. The distortion values listed are the default values that are included with the library. Unfortunately, following the 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.
<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>