Quote:
Originally Posted by Oscar in Bin
Greg, using them to scale the darks. However, because of this problem I am now matching dark exposure times to the actual imaging times.
In answer to the question about the number of frames I was taking 40 and doing a mean after a min/max reject of 2 each so data should have been pretty good.
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Sounds good. I thought sigma reject was hard to beat but I suppose you are doing in 2 steps what sigma reject does in one. Both approaches get rid of outliers that are artifacts rather than repeating noise.
40 sounds a lot. I think I could probably upgrade my darks as my biggest dark is about 16 and many are only about 8. But then my FLI cameras have practically no noise so its far less important than for other cameras. Still I find even with such low noise my CDK17 has quite a hot spot due to its design and corrector. Without a decent dark I find the flats just don't work. Strange. Anyone know why that would be?
Greg.