Luminous Landscape Forum
Raw & Post Processing, Printing => Digital Image Processing => Topic started by: Hening Bettermann on July 03, 2010, 05:01:17 pm
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When I try to find the optimal values for CA correction, I find that the different "slices" would require different values. Which would be the best way to proceed:
1-Correct all slices individually before stacking
2-Correct all slices by the same value, before stacking, choosing the value of the slice where CA is most obvious, typically branches against sky, distant or near infinity
3-Correct CA AFTER stacking
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My workflow is: shooting raw, converting with Raw Developer, CA correcting the TIFs in Adobe Camera Raw (CS3).
So far, I have been lazy and used method 2. Method 1 might amount to a lot of work depending on the number of slices. Also, I wonder if the difference between slices might be counterproductive, say if I don't hit the real optimum in one or more slices.
Stas Yatsenko from Helicon Help has answered "I think the results would be pretty [much] the same, but I would prefer to correct CA before stacking."
I would like your input on this.
Kind regards - Hening.
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When it's present, which is only in a few of my lenses, I do it before as my raw converter (C1) does a superb job handling it.
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Thank you for your reply. - So it looks like "before" is the way to go.