Quote:
Originally Posted by Shiraz
You could use longer subs, but you wouldn’t gain anything practical in signal to noise ratio
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This seems counter intuitive to me. If a one second sub is insufficient to overwhelm read noise but a 2 minute sub can, that means that the image signal is increasing at a faster rate than the read noise of the camera. Logically then a longer sub would increase the separation between the read noise and the signal. Obviously this is assuming that the one source of noise is the read noise which is not the case.