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Marc,
I haven't used any Bias frames. How do you capture bias frames with a qhy8 given it doesn't have a shutter?
I've tried longer exposures (up to 6 sec) and still get the same result. According to the tests I ran last weekend the ADU count for 4 sec is between 15000 and 35000 (LHS to RHS of histogram) with average at about 26000. Would this suggest my flats are over-exposed?
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