Quote:
Originally Posted by Shiraz
surely sky noise is detected inside the camera Peter.
In any event, the physics is pretty much identical if you add in sky noise. I am sure that M&Ts marvellous image included a little sky noise (they must have imaged through the atmosphere), but they were still able to detect a clear signal where photoelectrons were present in only about half of the subs.
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OK just so we are clear.
Shot noise, is a noise source from outside the camera, that is due to the random arrival of photons to individual pixels.
If you sample at too short an interval, this noise will become dominant.
Due to its physical and statistical nature, Shot noise is *reduced* by longer individual exposure times, regardless of other parameters the camera might have.