Thread: Onion rings
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Old 09-03-2006, 11:46 PM
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iceman (Mike)
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Location: Gosford, NSW, Australia
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robin, take note of the white level meter in K3CCD when you're about to start capturing. The image should be properly exposed, with no areas overexposed. So the white meter should be between 180-230 on most objects. I find that gives me the best range of exposure without onion rings.

Rob, as per DP, I focus with lower gain and gamma so there's higher contrast on the features to give your eyeball something to focus on. For Jupiter, I try and use a moon to focus on if the seeing is good. If the seeing is no good, it's much more difficult to focus on a dancing distorting moon.
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