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Steve, I really am not sure why you would expose 120-300 sec darks (or do you mean 60 sec stacked subs) for a 60 sec image sub. Hot pixels in long exposure darks, if stacked sum for example, would not match hot pixels in the image subs. Stacking software will adapt to different exposure times, but I dont get the point, why not stack like for like exposure times, this would reduce noise and leave hot pixels at the correct level.
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