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How does this sound.....
This is with a DSI, can't see how it would be different to any other CCD though....
I have wound down the gain, exposure to 200ms - I get a nice smooth frame, intensity all over about 21000. I can't see the dust unless I stretch the histogram.
Is it the difference between the areas that matters in a flat? Ie the difference in intensity between the corners and the centre, or the dust spots and the rest???
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