Pentax K-3 Mark III Monochrome files can't be developed in Darktable

[apolozanionut]

Describe the bug

Opening .PEF files captured with Pentax K-3 Mark III Monochrome simply show an error on open.

Steps to reproduce

1. Add to Library
2. Double click on file in Lighttable
3. Darkroom opens on light background with error message
4. Software returns for Lighttable and shows a skull for the image preview of the .PEF file.

Expected behavior

Darktable should open the file and allow disabling of white balance/demosaicing options for raw b&w files, similar to Lightroom.

Logfile | Screenshot | Screencast

No response

Commit

No response

Where did you obtain darktable from?

downloaded from www.darktable.org

darktable version

4.4.2

What OS are you using?

Windows

What is the version of your OS?

Windows 11 Pro 23H2

Describe your system?

Dell Precision M6700, AMD FirePro M6000, 32 GB RAM

Are you using OpenCL GPU in darktable?

Yes

If yes, what is the GPU card and driver?

AMD FirePro M6000, driver version 15.200.1045.0

Please provide additional context if applicable. You can attach files too, but might need to rename to .txt or .zip

I can reproduce the same behavior on my Mac.
Issue only appears on RAW file open.
Steps above can be reproduced with a fresh edit.
IMGP0282.PEF.txt
Unsure how to empty/new config-dir.
I do not use Lua scripts, Darktable fresh install from a few days ago.

[ptilopteri]

is your camera even supported by this version of darktable?

[jenshannoschwalm]

Could you share an raw image? Checked for examples already uploaded to raw pixls?

[kmilos]

Yeah, not supported yet since we're missing the samples.

Please upload both PEF and DNG samples to https://raw.pixls.us/ at your're earliest convenience.

[apolozanionut]

is your camera even supported by this version of darktable?

Apologies, how can I verify that?

[apolozanionut]

Yeah, not supported yet since we're missing the samples.

Please upload both PEF and DNG samples to https://raw.pixls.us/ at your're earliest convenience.

Hi kmilos, thank you for the very prompt reply (within minutes). I've uploaded the sample to raw pixls. Do let me know if additional samples are needed or if a different subject matter should be photographed. Thank you again for your support and very happy to use DT.

[apolozanionut]

Could you share an raw image? Checked for examples already uploaded to raw pixls?

Hi Jens, sure thing. I uploaded them to raw pixls. Thank you for your support.

[kmilos]

I uploaded them to raw pixls. Thank you for your support.

@LebedevRI

[LebedevRI]

@apolozanionut thank you for contributing the sample set!

[kmilos]

The DNGs should already be handled by darktable-org/rawspeed#487

I'll take a look at the PEFs as soon as I get chance.

[apolozanionut]

@apolozanionut thank you for contributing the sample set!

I thank you for your dedication for improving DT.

[apolozanionut]

The DNGs should already be handled by darktable-org/rawspeed#487

I'll take a look at the PEFs as soon as I get chance.

I confirm that the DNG files were successfully opened in DT.

[LebedevRI]

The DNGs should already be handled by darktable-org/rawspeed#487
I'll take a look at the PEFs as soon as I get chance.

I confirm that the DNG files were successfully opened in DT.

(FWIW, DNG's should just work even without that patch)

[kmilos]

@apolozanionut It would seem the DNG you uploaded was done by Adobe Lightroom? Please upload only the unaltered OOC DNG (and a PEF shot that is similar to that one).

[apolozanionut]

@apolozanionut It would seem the DNG you uploaded was done by Adobe Lightroom? Please upload only the unaltered OOC DNG (and a PEF shot that is similar to that one).

Apologies, will upload. The raw.pixl.us keeps throwing an HTTP Error 500. Will try again.

[kmilos]

I have now updated darktable-org/rawspeed#487 with support for PEF as well, please test if you can.

[LebedevRI]

@apolozanionut if possible, it would be nice to replace the newly-uploaded sample set
yet again - the left border is solid black, it's impossible to verify the crop with it.
Something like daylight landscape usually is best.

[apolozanionut]

@apolozanionut if possible, it would be nice to replace the newly-uploaded sample set yet again - the left border is solid black, it's impossible to verify the crop with it. Something like daylight landscape usually is best.

Hi Roman. I've uploaded the .DNG and .PEF samples, same subject, exposure, early morning landscape. Thank you for your support.

[LebedevRI]

@apolozanionut thank you, these are much better!

@kmilos @TurboGit what's the hard cut-off date, when will the tag be in place?

[kmilos]

what's the hard cut-off date, when will the tag be in place?

AFAIK, Dec 14?

[TurboGit]

I'll tag late on Dec 14th around 20h CET.