L1000546.dng (83.1 MB)
Hello everyone, all the best for the year 2023! I have a problem, darktable 4.2.0 does not accept my Leica Q2M DNG files as raw. Well, some modules, like raw-black/white-point do, others don’t. What do you say about this?
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Isn’t that a monochrome, i.e. black&white, camera?
In that case, there is only one colour channel, so demosaicing (and highlight reconstruction or white balance) aren’t needed or even possible. That doesn’t mean your file isn’t recognised as a raw file… In fact, your example is perfectly editable in dt
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Extracted a pgm file with dcraw and it looked the same.
dcraw -E -4 -j -t 0 -s all L1000546.dng
So I think it is like rvietor wrote. One problem with darktable in that case is that the hot pixel filter will not work. And hightlight reconstruction.
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All the modules that refuse to work for these files are applied before demosaicing. So they may written for a bayer matrix. In that case, they can’t work on monochrome files. You can’t just look at any neighbouring pixel on a standard raw file , you have to take the colour channel into account. So you need to know the filter matrix layout, and that info is missing here (because there are no filters).
E.g. the hot pixel filter: you don’t want that to look at the directly neighbouring pixels, only at neighbouring pixels of the same colour (think of parts of the image with e.g. saturated red, no green or blue: every red pixel would be hot if you look at the directly neighbouring pixels…)
@Moo-Crumpus : perhaps you would like to add a license to your raw file, so others can post their versions legally? Similar to what is done for this image of a gannet
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Do you have an idea if this applies to HDR, too? This tool I can’t use, it tells me “for raw files only”.
I will have a look into license, thank you.
This file is licensed Creative Commons, By-Attribution, Share-Alike.
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It’s not the point that highlights reconstruction, raw chromatic aberration and don’t work in the meaning of “unfortunately not”.
They simple don’t make any sense at all. Your camera has no need to do so! Be happy to have such a great peace of hardware 
would love to have one, will stick to my Q2 for now.
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For HDR merge it could be done but that would lead to many color artefacts as it is implemented right now.
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Happy new year to you too, @Moo-Crumpus ! (now I wonder, do you eat crumpets?? 
)
Thanks for the image - I’ve never tried editing a Monochrom image like this before… takes some getting used to not being able to use my usual tricks with colours 
Lovely and sharp and low noise though.
L1000546.dng.xmp (9.5 KB)
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Thank you all for your xmp files and hints! This gives me a lot of ideas what I need to learn about darktable. I am way too used to my lab workflow and looking for “similar tools” in darktable too much.
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I love cookies!
Me too! 
Out of interest,
Wondering if you mean lab as in analogue darkroom, or a different piece of software? Just interested as I’ve dabbled in analogue black and white - not seriously though.
Yep. Either the image is good, or not. If not you can delete it right it away. There is very little one can do with that lack of color channels. Some cropping, straightening, maybe gradient, toning, sharpening (ok, actually some things you can do)
You want dark sky - you need to put that red filter in front of the lens, can’t be done in post-process.
This is why I wouldn’t buy any Leica M (and of course the cost plays a role too)
I also have one camera with a Sigma Foveon sensor, it’s also a one-trick-pony (that darktable can’t handle)
Nice out-of-cam image though
lab as an analogue darkroom, the one I once was glad to own. I loved the workflow.
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