Quote:
Originally Posted by Ryderscope
Any increase in noise from what ever source is going to decrease SNR assuming the signal level remains constant.
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In that sub, sure. But the SNR will typically increase from averaging subs, even including such poorer ones. That's why we stack, after all. As long as the noise is not too extreme in any of the subs, as I said. I was just trying to work out how extreme the noise need be before it doesn't help the final SNR of the stack and actually lowers it.
Quote:
Originally Posted by Ryderscope
Alternatively if one has to travel to a dark site and set up just for the weekend (which I have done previously) then one tries to hang on to as many photons as possible.
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Absolutely
