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Here's a thought. I don't know the answer and it is entirely speculative but if I have ICNR on, and Nebulosity patiently waits for the internal dark frame to complete, what is it that it receives by way of image? Is it the exposure minus the dark or is it the exposure only? I can't put this down to dodgy cables or hubs because I've tried endless perms and coms with these things with no change. I took some frames last night and Nebulosity displayed them progressively and the background noiuse was terrible. But then it occurred to me that what it was showing was a FITS image unprocessed and maybe that's normal. The rubbish gets dumped in the stacking process? Perhaps??
Peter
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