Measure black and white levels?

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Raw files added in the zip file.

I checked Exif with Exiftool. It actual says 126 127 126 127.

Perhaps a tool I already am familiar with could help…

Skärmbild från 2022-08-09 23-29-38
Skärmbild från 2022-08-09 23-29-38737×249 67.2 KB