FRINGING is not causeed by CA, so getting an APO lens to eliminate CA is not going to help the FRINGING problem. jco
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Brendan MacRae Sent: Saturday, April 14, 2007 12:19 PM To: Pentax-Discuss Mail List Subject: Re: Full frame lenses and the K10D, CA anyone? --- Digital Image Studio <[EMAIL PROTECTED]> wrote: > On 14/04/07, Brendan MacRae > <[EMAIL PROTECTED]> wrote: > > > Yeah, ACR is completely ineffectual with this one. > > Some of the Photoshop tips I've seen can make a > > dent...but not enough of one. > > The answer is get some decent APO lenses I guess, > this is exactly the > reason that my V125/2.5 is so much more usable wide > open than my old > A*135/1.8. C'est la vie. > I think that's the answer, Rob. I have seen some tests with the K10D and the 645 version of the 400mm f5.6 IF ED lens and it suffers from purple fringing, too. I suppose most long lenses wide open shooting birds in trees against the sky are going to show this weekness. ED glass alone obviously doesn't seem to fix this problem, at least on digital bodies. I've heard some claim that APO will help in this regard. Supposedly the Sigma 400 APO solves this problem but I haven't seen anything definitive. -Brendan __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- 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
