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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] (current)
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.  ​
 +    <​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>​
 ===== Links ===== ===== Links =====