Might be a few things going on, might just be processing steps.
Exiftool reports the white-level as 15360 for this file, while Darktable sets it too high.
Setting white-level to 15360, disabling highlight reconstruction and filmic and lowering exposure way down you can see what’s in your sensor data (sort of):
I think the halo you are referring to is visible here, and is basically heavy fringing / chromatic aberrations I’m guessing.
I’ve been toying around, but I’ve issues getting the look from the jpeg.
Probably because it’s full of the chroma-shift that filmic tries so hard to prevent .
But that little red border is hard to remove, maybe a lens-profile might help.
If I process the ARW through DxO, it’s also an unknown lens so no lens corrections, but I can crank the chromatic-aberrations module up and enable ‘fringing correction’ to get rid of it.
Saving that as a DNG and processing it in Darktable gives an easier workflow for me, but it’s obviously not for everyone .
@jorismak What are for you the advantages using the DNG format?
@age First I found the sony colours better, but the following day I observed the sunset again while watching the pictures I realised that the colours I get with darktable are more similar to what I saw in reality.
I use a commercial application to open and demosaic the raw file , and apply some fixes (like in this case the chromatic aberrations around the sun disc ) before loading it into Darktable.
Darktable works faster because it doesn’t has to do sharpening , denoising, demosaicing, etc…
In this case, the only reason is that i can’t seem to get rid of the red fringing around the sun with the ‘chromatic aberration’ module in Darktable, but DxO’s aberration fixer clears it right up.