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Hmm, what range is there on gain setting of a QHY8 is it 0-100? Surely it is worth lifting it a little way above minimum to get better sensitivity and a corresponding reduction in required exposure times?
Setting gain/exposure to avoid clipping of bright stars will not give the best result for the fainter objects will it? Multiple exposures seem to be the way to go to handle high dynamic range?
Is this gain setting not the analog of ISO on a DSLR? If yes most would not shoot at ISO100 (I know I don't go below 400 for Astro shots) but shoot at 4,8 or even 1600 to keep the exposure times down.
Perhaps this is not a simple issue and depends on the CCD hardware and software to a high degree so I will have to do more experiments?
Surely there is a better way to set about this than trial and error?
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