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Old 08-06-2016, 02:35 PM
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Shiraz (Ray)
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Join Date: Apr 2010
Location: ardrossan south australia
Posts: 4,918
FYI, the attached table shows predicted optimum settings for my 250f4 system for a 3hour broadband galaxy imaging session under fairly dark sky. Early testing shows that this may be slightly optimistic - 1 minute subs gave better results than 30 seconds at gain 100 in the real world.

The most interesting outcome is that the dynamic range holds up well up to gain 100.
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