Well, I can show you files from my Nikon D700 (bayer) which have a large amount of CA even at f/8.0
Okay I found the neutral profile and that works! I need to read the manual more, I don’t understand what is going on here.
I will do more tests to see if it can be CA. Unfortunately I don’t have other lenses.
Exactly! I thought it had to do with alignment with the sensor matrix, but maybe there is another explanation.
Can you please show where in the frame this part of the image is?
Is your lens the 35/F2?
The 1.4 has quite low CA. This looks strange
Actually it might be transverse CA! I didn’t expect it to be so bad. I have checked other pictures and It looks like the blue is always moved towards the centre of the picture.
I rarely use lensfun or explicit CA correction with this lens. It is simply not necessary there.
Could you post a RAF?
Maybe it’s just a bad copy? CA correction in RT makes it much better even though it’s not completely gone. DSCF0468.raf (28.5 MB)
I just got this lens as well, and I have an X-T20 if you guys need another test point.
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I think you should not use such extreme magnification.
Here is an example of my copy mounted on a X-E2s, also using 1600. The snippet is from far right of the frame:
And this is the same with 100%
There is visible CA, which is being over-corrected by lensfun.
Iridient X-Transformer performs a bit better:
Oh I have to apologize @fschhh! The blue glow on your image does not really look like CA. At least not what I am used to. It is stronger and shows a very saturated blue, my copy shows a bit blue towards the center and stronger orange outwards.
Edit: playing with Defringe tool
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disabled
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enabled
The GUI for Defringe seems to have a bug. It shows only the upper half of the equalizer for a few seconds:
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I can confirm this bug, please file a bug report. (I apologize for not reporting it sooner, I’ve been lazy)
The same bug also appears on the skin tones graph of the vibrance tool.
Please do not report this GUI bug. It is a well known bug for all curve dialogs, for which we haven’t got a solution as far as I know 
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I checked, I really think it’s CA now. The bright areas are always leaking blue towards the centre of the image. My copy of that lens must just be worse than yours, and I’m not used to such high resolution sensors (my previous camera had 12 Mpix). Sorry for polluting the thread.
Too late 
BTW, a DNG conversion with Iridient also shows these blue edges.
I never heard that the amount of CA can spread so much over different copies. Centering yes, center sharpness maybe, but CA and Bokeh are the result of physical construction. Weird thing!
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Sorry, I’m new to this community, andI have exactly the same problem. But what I don’t understand: I have the version 5.8 and I do not have the “Preprocess white balance” tab at al! where can I find it?
Hi, you can get the latest dev version here:
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Thank you!