Quote:
Originally Posted by dpastern
I still don't see why there's so much noise from the stacked pair, especially when noise in the individual images is far less.
Dave
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I do not think so.
Try to increase the contrast of the individual CR2 image to the same extent as a stacked image and you will see it contains LESS noise.
The important thing to remember is that the S/N (Signal to Noise ratio) is what we are talking about here and what we are increasing by stacking a number of individual frames into a single image.