Pentax lens not recognized

LimCW · January 10, 2026, 4:19am

Hi, To the Darktable development team: thank you for resolving the Pentax K-3 III Monochrome crash that occurred when adjusting the detail threshold slider. Your work is greatly appreciated.

I am writing to report a persistent lens detection issue. While Darktable 5.4.0 successfully identifies the HD PENTAX-DA 55-300mm F4.5-6.3 ED PLM WR RE, it consistently fails to recognize the HD PENTAX-DA★ 16-50mm F2.8 ED PLM AW.

I would appreciate it if the team could look into adding support for this specific lens profile in a future update.

Thanks

paperdigits · January 10, 2026, 4:48am

Hi, lens names and such are usually handled by exiv2 and lens fun for correction.

When you say “failed to recognize” what does that mean exactly?

LimCW · January 10, 2026, 4:51am

Kindly refer to attached as shown in RED arrow.
Thanks

MStraeten · January 10, 2026, 6:35am

you need to help exiv2 to identify the correct name:
see:

LimCW · January 10, 2026, 6:38am

Ok thanks I’ll try it.

paperdigits · January 10, 2026, 6:43am

Ah, I should really put that somewhere more visible. Maybe the FAQ page or something.

Macchiato17 · January 10, 2026, 9:32am

Yes that would be great, it’s requested quite often from my perception.

kmilos · January 10, 2026, 10:22am

I (or anybody) could add this lens to exiv2, but there is no timeline for the next release. Please feel free to use the exiv2.ini config file workaround in the meantime.

Jetze · January 10, 2026, 10:47pm

There might be more influencing this.
I use this lens (on another K-3 version) and dt does not have a problem recognizing it.

Hope this helps.

kmilos · January 10, 2026, 10:51pm

Could be a difference in exiv2 version: the Windows package the OP uses is stuck on older 0.27.7 unfortunately. This lens was indeed added in 0.28.4.