PanoTools NG:
Re: CA for sigma fisheye in dcraw
Hans 2009-Dec-18 00:57:23
--- In #removed#, "Jeffrey Martin | 360Cities.net" <360cities@...> wrote:
>
> has anyone corrected the CA for their sigma 8mm 3.5 or 4 in dcraw?
>
> i'd really like to know what settings you used.......
As far as I can see the only way to reduce CA in DCRaw is to use the same way as I did in Photoshop way back in 2002 before Ca reduction in Camera Raw existed. Not really a way to do it today but if you really want you can just find the factors in Photoshop first using your eye.
Cited:
Enlarge the raw red and blue layers by the given factors, typically 0.999 to 1.001, to correct chromatic aberration.
Hans
>
>
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> Jeffrey Martin
> tel. +420 608 076 502 / skype jeffrey.s.martin
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