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Hidden in the LR 5.3 release notes... camera profiles for damn near every Oly m43 body ever

Started Dec 12, 2013 | Discussions thread
exdeejjjaaaa
exdeejjjaaaa Veteran Member • Posts: 8,263
Re: Here is a sample image with the different profiles applied
3

Florida Nature Photographer wrote:

Does this mean it is not necessary to check the "Remove Chromatic Aberration" box when developing a photo?

1) Adobe's mechanism (and I bet in other converters too) for correction of Lateral CA is to correct geometrical distortion for 3 color "planes" (RGB) separately and differently thus eliminating that CA, so it is done at once with geometry correction because you can correct the geometry and that CA in one step, instead of 2 steps - saves CPU time and reduces various math errors (plus think - if m43 manufacturers have an agreement with Adobe to for Adobe to correct optics w/o no choice for user to switch it off then why do you think Adobe will allow you to switch off such CA corrections, make that not totally automatic regardless of UI, that m43 manufacturers themselves are doing for in camera JPG files)

2) parameters for optics correction supplied by Panasonic/Olympus tend to be on some conservative side (note - you might get better corrections from DxO raw converter then), so automatic optics correction does not remove them completely

3) there are also other forms of aberrations ( http://blogs.adobe.com/lightroomjournal/2012/04/new-color-fringe-correction-controls.html )
4) you never know (unless you test) if indeed LaCA correction parameters were written in your raw file (like I find out that for E-M1 + PL45/2.8 it is not the case)

as a result, you still might check "Remove Chromatic Aberration" and see the changes (it might further correct some aberrations, undercorrected by automatic correction or probably even partially LoCAs because I think software might mix in some cases/aread of the image LoCA w/ LaCA, or make things actually worse in some exotic cases)... I check "Remove Chromatic Aberration" in all cases by default, you mileage may be different.

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