Fujifilm X-T2: Exposure dependent on ISO setting
I took a series of photos with ISO values from 200 to 12800 on my Fujifilm X-T2. The exposure was kept the same by adjusting the shutter speed, all other values (aperture, white balance, ...) were unchanged.
When looking at the in-camera JPGs, the exposure stays pretty much the same for all ISO values / shutter speeds:
When importing the raw files into darktable 2.6.2, only the ISO values from 200 - 320 match the exposure of the in-camera JPG. From ISO 400 - ISO 640 all photos are about one stop underexposed, photos with ISO 800 or higher are more than two stops underexposed. To demonstrate the problem I exported the RAW files into JPG with the default settings applied by darktable:
As reference I also provide the RAW files:
Please note that I use darktable 2.6.2, but this version is not available in the "Affected Version" drop-down box.