Exposure shifted in Pentax K-1 DNGs
I have an issue that I can't debug by myself sadly: for the purpose of noise profiling, I took controlled (artificial lighting) pictures with my K-1 (aperture fixed, then for each iso level change, I halve the exposure time).
But in darktable, I notice a big exposition difference (~1ev) in luminosity between iso 100 and >= 200 (no curve or anything):
JPEG exported from darktable: https://drive.google.com/open?id=0B0J6-mibfIUEZ1BsTWkxMzVOTWs
JPEG exported from darktable: https://drive.google.com/open?id=0B0J6-mibfIUERzdDdExuWjZNQ2s
I'm not sure of what is happening... DCRAW outputs images with a similar luminosity, so there must be something wrong during import...