PanoTools NG:
Re: CA for sigma fisheye in dcraw
prague 2009-Dec-18 13:33:38
Hans you're WRONG!
:-DDD
DCRaw has supported CA correction for a couple years now, apparently.
PS and other raw programs' CA settings don't translate from one to another. hence my question. (and yes I know, each lens might differ a bit)
thanks,
Jeffrey
--- In #removed#, "Hans" <hans@...> wrote:
>
>
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> --- 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
>
>
> >
> >
> >
> > Jeffrey Martin
> > tel. +420 608 076 502 / skype jeffrey.s.martin
> > www.360cities.net - The world's best panoramic photography
> > www.panoverflow.com - How to make Panoramas
> > facebook.com/360cities - Join us on Facebook
> > twitter.com/360cities - Follow us on Twitter
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
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