Quote:
Originally Posted by Peter Ward
The problem with that analysis is whether or not the noise is correlated.
SBIG have sublime temperature regulation (1/100th of a degree)....better than most....hence you can ramp up the gain and get a tad more signal and, yes, you get snow, *but* when reduced the data has bugger-all correlated noise.
I have stacked thousands of frames with SBIG gear and have yet to see a correlated noise pattern build.
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That is true. Its not really a problem as you point out as it dark subtracts out well but as far as measuring sensor performance goes I was using it as an example with these DSLR sensor comparison performances. Its not all about the chip but also the quality of the surrounding electronics.
Greg.