Quote:
Originally Posted by ghsmith45
The photons don't care, but the camera does. You get read-out noise for every sub, so with 1000 tracked and stacked you get about 32 [sqrt(1000)] times as much read-out noise as with a single exposure. Also, if the initial exposure is too short to trigger a signal in the camera, then adding a thousand zeros still gives you zero.
Geoff
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Hi Geoff
Yes,point taken but remember that the Poisson noise will become the dominant noise source and will exceed the track and stack read out noise.
Regards
Steve