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 > >> > >> > >> > > > > >
