I don't have any problem subtracing a dark frame, by loading the files first then the dark frame then ticking the checkbox to subtract the dark (not sure what the "Raw" checkbox does??).
However, anyone got tips for subtracting multiple dark frames? In CCDSoft I normally use at least 3-5 dark frames, combined for ruduction. Registax only supports loading the one from what I can tell.
If I try to stack the dark frames in CCDSoft manually (25mb files from my 350D) CCDSoft gets a file format error, not sure why. If I try to stack the dark frames in Registax there's of course nothing to align on, and I can't skip the alignment stage and go straight to stacking.
Ideas?
Roger.
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