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Slide Away The Aberrations
If you see areas of bright-colored fringe appearing around objects in your RAW photos, you’re suffering from Chromatic Aberrations (well, you’re not, but your camera’s lens is). Under the Lens tab in Camera Raw, there are two sliders (Fix Red/Cyan Fringe and Fix Blue/Yellow Fringe) that you let you slide those problems away, but seeing the problem clearly enough to eliminate the fringe is your first challenge. That’s why you’ll want to know this tip: If you hold the Option key (PC: Alt key) while you’re dragging either Chromatic Aberration slider, it will only show the two channels you’re adjusting in the preview area, making it easier to see—and repair—the problem.
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Create A Composite Layer
If you have a multilayer composition and you
want to apply an effect to all the layers at once, don’t flatten the layers–use a composite layer instead. Hide the layers you want excluded, and press Shift-Command-Option-E (PC: Shift-Ctrl-Alt-E). A new layer will be created at the top containing a merged copy of all the visible layers.
Another option is to create a new layer at the top of the stack and make it active. Command-click (PC: Ctrl-click) each layer you want to include to make those layers active, as well. Press Option-Command-E (PC: Alt-Ctrl-E).
by Colin Smith
Rod said on — March 30, 2008 @ 1:10 am
This is a superb hint – it truly does make it so much easier to correct CA.
Many thanks – Rod