Okay, never mind. PF can be aggravated by blooming, but it sounds like it's still a sensor issue.
t On 9/21/05 8:05, Tim Sherburne wrote: > > Hmm, now I thought that the purple fringing problem was due to the sensor > where saturated cells flood their neighbors. Here's what dpreview says on the > subject... > > <http://www.dpreview.com/learn/?/Glossary/Digital_Imaging/Blooming_01.htm> > > t > > On 9/21/05 8:00, [EMAIL PROTECTED] wrote: > >> Interesting, although based on considerable experience, it seems that a >> purple >> fringing boundary effect occurs much more frequently with certain lenses. >> However that could be related to what type of shooting I do with those >> lenses. >> For example, I use my A 400 and A2X-S converter to shoot birds that are >> higher >> up in trees. This situation frequently gives me an underexposed backlit >> branch >> against a bright sky -- and purple fringe. I've been blaming it on the >> converter/lens combination. >> Paul >> >> >>> Most of the purple fringing I see is a sensor effect, not lens >>> related, on high contrast boundaries where one side of the boundary >>> is at saturation and the other is underexposed. >>> >>> Godfrey >>> >>> On Sep 21, 2005, at 4:33 AM, Paul Stenquist wrote: >>> >>>> Hi Shel, >>>> Sometimes it's a result of red and blue chromatic aberration. If >>>> so, you can correct it reasonably well by going to the "lens" tab >>>> in the RAW converter and adjusting the CA sliders. At other times >>>> it seems to be the result of backlight on dark objects, such as >>>> branches against a sky and doesn't seem to be affected much by CA >>>> adustment. I find this effect is more common to some lenses than >>>> others. In situations where it was important to remove the fringe >>>> and CA adjustment yields little improvement, I've occasionally >>>> resorted to cloning it out after masking or selecting the >>>> appropriate area. Lots of work, but it can be done effectively. >>>> Paul >>>> On Sep 21, 2005, at 6:48 AM, Shel Belinkoff wrote: >>>> >>>> >>>>> Any suggestions on how to rid an image of purple fringing ... >>>>> >>>>> >>>>> Shel >>>>> >>>>> >>>>> >>>> >>>> >>> >> >> >>
