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Very informative results Lee - thanks. The short exposures clearly work for your system and the extra subs all help with SNR.
I think that the SNR trend is the expected SNR=const*SQR(frames)..(ie doubling the number of frames gives 1.4x the SNR).. but the graph certainly does not have much obvious curvature in this region . I plotted your SNR against SQR(frames) and got a nearly perfect linear relationship, so that is an effective way to measure SNR.
Any idea how much resolution improvement is likely to be available by smarter stacking of shorter subs? I tried (again) to test this last night, but clouds appeared half way through.
regards Ray
Last edited by Shiraz; 07-05-2016 at 10:27 AM.
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