How can you prevent purple frinding?

Question: How can you prevent purple frinding!?

I'm expanding Lidy's question a little because I am having some problems with my camera!.
http://answers!.yahoo!.com/question/index;!.!.!.

I have knocked the exposure down one notch and it has helped a little!. Does anyone have any other suggestions!?Www@QuestionHome@Com

Best Answer - Chosen by Asker:

Don't use the largest aperture especially when you have a strongly backlit scene (like tree branches against the sky)
Backing off the zoom a little bit will help too but the aperture is the main one!.!.!.at least in my experience!. A polarizing filter may help too as it cuts down "stray" light but that is just a guess!. Buying quality lenses that are designed for digital cameras!.Www@QuestionHome@Com

While it can occur in almost any situation, purple fringing is worst:

-- at extreme ends of zooms
-- at large apertures
-- in situations of high contrast (bright sunlight)

It also plagues overly ambitious lens designs, where the zoom ratio is greater than 3 or 4X!. When camera or lens shopping, avoid "superzooms"!.

PF is somewhat fixable in image editing!. Google for more information!.

VWww@QuestionHome@Com

Purple fringing is an artifact from chromatic aberration in your lens and then is accentuated by your digital sensor!. There are probably focal lengths (zoom mm) where your lens is better, i!.e!. there is less fringing, but it probably won't go away altogether!. Where you'll see it most is high contrast areas, like when a white or bright area is next to a black or dark area!.

Some image editing programs, like Photoshop CS2 or CS3 have tools for reducing chromatic aberration!.Www@QuestionHome@Com

Being careful about shooting into the sun and creating high contrast situations will help!. This often a function of the quality of the lens, as well!. Interestingly enough, I have a Canon lens ( EF 28-135 IS) that will fringe in a heartbeat and a Tamron (17-50 f/2!.8) that won't do it even if I try!.

Working to keep the sun at your back while shooting outdoors will naturally reduce the contrast of the scene and help with this problem!.Www@QuestionHome@Com

Use a higher f-number which is a smaller aperture!.Www@QuestionHome@Com