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You can't always fix chromatic aberration. | by theilr
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You can't always fix chromatic aberration.

when i went from jpeg to raw, one of the nice things was the ability to "fix" chromatic aberration (CA), that color fringing that is particularly noticeable on high-contrast edges away from the center of the image. i use some software called "Bibble" for converting the raw back to jpeg, and it has two sliders for making the adjustment that often fixes the problem.

 

indeed, it seems that lens manufacturers have relaxed their requirements for CA since it can be fixed digitally. but the digital fix only seems to work when the image is in sharp focus; for shots like this (a deck of cards seen from the side), the CA is enhanced, and more to the point extended, in the out-of-focus part of the image, and cannot be removed using the same digital trick that works for in-focus CA.

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Taken on May 25, 2009