Besides, if you're working in B&W, like a real man, it hardly matters.
Actually chromatic aberration / purple fringing removal (or using a system which does not have any) can be a very important step in B+W workflow.
If you're using sophisticated RGB B+W conversion, like a real man, then purple fringing / sensor bloom or chromatic aberration can create unwanted dark or light halos around your subject matter. For instance if you are using a red-biased black and white conversion to make more brighter/creamier skin tones you'll find that any dark subject matter with a hard edge has a (sometimes very strong) white halo where the red chromatic aberration was pushed up in tonality. Even worse is when you got a dark outline on the interior side of a bright edge - very unnatural.
Also not all programs with a "defringe" or "chromatic aberration tool" perform at the same level for any given camera/lens.
I was not able to remove the CA of this image with LR (right) without damaging other parts of the image but it was easy in C1 with no deleterious effects (left) - more about this image
@Edmund: CA and blooming can be very easy to remove in post. But it can also be a nightmare. It depends very much on which raw processor, and what camera/lens. The most difficult chromatic aberration is often CA in slightly out of focus areas where the algorithms have a hard time telling the difference between magenta/green subject matter and magenta/green chromatic aberration.
Doug Peterson (e-mail Me)
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