However, the purple fringing that frequently can be seen in high contrast areas of digital pics is not CA. One way to tell the difference is that CA can be corrected in the PSCS RAW converter. Purple fringing has to be eliminated some other way. "Replace color" is usually a good option, but there have been times when I've had to paint it out by hand. Paul On Nov 14, 2006, at 11:28 AM, David Savage wrote:
> G'day Shel > > Look for colour fringing. It sometimes looks like a mild case of > blooming that's not just purple, sometimes it's green, cyan, yellow > etc., and not always limited to high contrast transitions. > > If you download some of the full size K10D samples that Ken brought to > our attention: > > <http://dc.watch.impress.co.jp/cda/review/2006/11/13/5035.html> > > ..you'll see in the last shot in particular, in the top left corner > there's yellow/green & pink/purple CA. And in the second last shot of > the crane I can see some green CA as well. > > For a definition there's Wikipedia: > > <http://en.wikipedia.org/wiki/Chromatic_aberration> > > ...and even DPReview: > > <http://www.dpreview.com/learn/?/key=chromatic+aberration> > > HTH > > Dave > > On 11/14/06, Shel Belinkoff <[EMAIL PROTECTED]> wrote: >> It was recently mentioned that some pics that were posted here and >> which >> were made with a K18/3.5 had CA. I looked and couldn't see any, and >> haven't seen any with my 18/3.5. Maybe I don't know what to look >> for. >> >> Can someone explain (in simple terms) what CA is, how it can be >> recognized, >> and perhaps provide a URL to an example or two. Thanks. >> >> >> Signed >> >> Ignorant in Ignacio >> >> >> >> >> -- >> PDML Pentax-Discuss Mail List >> [email protected] >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
