When creating Dark Frames for calibration purposes, the resulting darks always come out totally white, which leads me to the conclusion that the result is inverted before being saved to disk. This obviously caused severe problems with the subsequent calibrations.
I use a cooled ASI1600 Colour camera and, yes, I always screw the cap back on to the refractor before staring the Dark Sequence. Most of the time I set up the sequence to shoot one dark followed by a Bias frame etc. The Bias frames come up black, almost black when stretched, which is correct, but the Darks always come up white (inverted). When I manually invert the Dark frame in SGPro, the picture is black and when zooming in I can see hot pixels, so I assume that the actual photo is correct but that it is then automatically inverted whilst being saved.
Maybe I've changed some setting for Dark Frames, but I don't know where I could have done this? Any ideas? How can I invert the files permanently, as the inversion in SGP is for display purposes only (I assume).
Thank you for your support.