It looks like Fujifilm’s X-T4 is not yet fully integrated into/recognized by darktable-git 3.3.0(+2013).
Can I assist in any way by producing some kind of files?
@LebedevRI?
Sincerely,
Claes in Lund, Sweden
It’s supported in darktable master since RawSpeed submodule update: camera support mostly · darktable-org/darktable@10f133d · GitHub
No idea about stable branch/releases
You could check the master packages from https://discuss.pixls.us/t/various-packages-for-darktable/6192 and make sure everything is working well.
Thank you for your reply.
But I am using the current master darktable-git
(Manjaro/Gnome AUR):
and camera is not found (from an uncompressed X-T4 RAF):
I am puzzled.
Have fun!
Claes in Lund, Sweden
Last time i checked, lens correction support is lensfun’s problem,
it’s not correlated with darktable’s version.
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Aha.
Spasibo!
/Claes
This is not a problem of darktable but lensfun. I use the Fuji X-T4 myself and have helped myself by making my own database entry for lensfun.
~/.local/share/lensfun/Fujifilm-X-T4.xml
Contents:
<lensdatabase version="1">
<camera>
<maker>Fujifilm</maker>.
<model>X-T4</model>
<mount>Fujifilm X</mount>
<cropfactor>1.528</cropfactor>
</camera>
</lensdatabase>
The Fuji X-T4 is recognized without any problems. Every now and then I check after a lensfun-update if the X-T4 is now “officially” in the system-wide entries
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Thank you very much, @majobu!
That did the trick.
I have tried something similar: I placed my X-T4 data in the most recent, updated folder (~/.local/share/lensfun/updates/version_2/mil-fujifilm.xml) — but that did not work! Wonder why 
Have fun!
Claes in Lund, Sweden
You can edit lensfun/mil-fujifilm.xml at master · lensfun/lensfun · GitHub and initiate a pull request instead of waiting for others to do this 
maybe the entry is expected in version_1 directory
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