CR3 to Tiff conversion results in different brightness levels


I have two .CR3 files (Canon M50 Mark II), which were taken with exactly the same parameters, and the same illumination, so I would expect the same brightness level (and the .jpeg files indeed have the same brightness).

When I'm converting the .CR3 files to 16-bit TIFF files using the latest bits of LibRaw (2021-10), I get two TIFF images with quite different brightness levels.

Converting the .CR3 files first to .DNG files, using Adobes DNG converter, and then convert those .DNG files to 16-Bit TIFF files with LibRaw result in the same brightness level, as expected.

Is there any 'hidden' factor in the .CR3 files, which is not taken into account in the current LibRaw version?

Maybe it has something to do with the fact that those pictures are slighly overexposured, because I can't see this effect with pictures which are not overexposured.

Thanks, Lellid


It is very difficult to

It is very difficult to discuss the problem in abstract without having sample files

-- Alex Tutubalin @LibRaw LLC

Providing the files


I can provide the files (as long as they will not appear in a public forum). I think it would suffice to upload the two .CR3 files (35 MB each). Can you please show me a way to upload them?


We never publish files that

We never publish files that are sent to us without explicit permission.

Please use any file sharing service (e.g. WeTransfer/free option) and send the link to

-- Alex Tutubalin @LibRaw LLC