Purple Fringing Quick Fixes
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Here is a sample of that post.
Purple Fringing, AKA: Chromatic Aberrations (sounds like something you would hear on an episode of X-Files), AKA: Lens Fringing. Even with the best lenses you will occasionally find these little buggers lurking amongst the edges of your photos. Purple fringing usually shows up as purple halo's around objects in the edges of your photos. Luckily there are a few easy Photoshop fixes you can do to get rid of them.
Lens Correction - Fire up Photoshop and go to the Filter menu, Distort, Lens Correction. This will open your image in the Lens Correction editor. Under the Chromatic Aberrations slider there are two options, depending on what kind of fringing you have use the appropriate slider. Hit OK when your done and goodbye chromatic aberrations.
Hue/Saturation layer - Here is an easy one. Open your fringing image...snicker, snicker... in Photoshop and click the Add Adjustment Layer button, select the Hue/Saturation option and where is says "Edit Master" change it to the color you want to get rid of, magenta for example. Then with the eyedropper tool click on the area of fringe you want to get rid of then slide the saturation slider to the left to desaturate that area.
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