Quote:
Originally Posted by gregbradley
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Not all cameras get the same gain on 2x2 but there always seems to be a gain. It isn't 4X though more like 2.0X. Richard Crisp did a paper about this recently measuring an 8300 chip for 2x2 performance. As I recall it ended up about 2X better signal to noise ratio using 2x2.
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I found something similar, although nothing actually measured. Instead of 2x2 exposure times being 1/4 those of the 1x1 lum, I was going with 1/2 the exposure time. eg L at 1x1 was 4mins, I'd use 2x2 RGB at 2 mins instead of 1min.
Is that what you're saying?