Hey.
I have a problem with aberration correction. Automatic correction button is inactive.
How to deal with this. (RT 5.3) ??
Camera found (a6000). A lens selected from the list (Sigma 30 f1.4 DC DN)
Hubert
Hi @hubertus75
If you are referring to the Profile Lens Correction tool’s chromatic aberration correction checkbox, it requires that the lens data has chromatic aberration correction parameters - not all do.
http://rawpedia.rawtherapee.com/Lens/Geometry#Profiled_Lens_Correction
http://rawpedia.rawtherapee.com/Chromatic_Aberration
What a pity…
Thank you.
It’s not a pity, it’s open-source, and that means that you can improve the situation:
http://lensfun.sourceforge.net/calibration/
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@hubertus75 use the raw tab chromatic aberration fix instead. It works quite well in most cases. Just tick the box marked in red below.
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Thank you.
Thanks o lot.
There is also the filter “defringe” in the details-tab (I think it works better than the chormatic aberration filter). I am going to post a tutorial on my blog later this day, not sure in which language though
Each tool is best suited to deal with a distinct problem. It would be bad advice to recommend using one to tackle the other’s problems - as an abnormal case yes, but not as a general recommendation.
Each tool is best suited to deal with a distinct problem. It would be bad advice to recommend using one to tackle the other’s problems - as an abnormal case yes, but not as a general recommendation.
OK. I expressed myself incorrectly. I meant: I would first check chromatic aberrations in the raw tab and then, if there is still ca, I would go to details - defringe.
Much better 
Hi.
I am waiting for your tutorial about it.
Hubert
http://betazoid.bplaced.net/lilac/wp-content/uploads/2018/03/rt5.pdf
I chose German for the German Rawpedia is very incomplete.
Basically it is easy: Go to “Details - Defringe”, click on “curve: hue” and pull up the point at the basis of the color of your CA. Just a little bit is usually enough.
Thanks! I will use your hints when I have a problem with the CA.
It works very well! Thanks.
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how does the manual correction in raw tab work? is it pre-demosaicing?
Yes, but the manual settings are applied to the whole raw data, whereas the automatic settings are calculated (and applied) for tiles of the raw data.
So manual settings should not create those zigzag lines sometimes seen in noisy images with auto correction enabled?
Can you provide an example please?
I’ll have to some digging. But noisy images seemed to be the most susceptible to the visible tile lines, as well as images with large swaths of solid colour (blue sky).