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Interesting, I would have thought that this was the role of taking 'Darks and Bias'. Darks the same length as your exposure to show this excess noise and the Bias on the shortest exposure to show up the random noise so it could be subtracted later on when the images are combined. Could be wrong though.
JohnG
Last edited by JohnG; 26-05-2006 at 04:25 PM.
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