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Old 16-03-2015, 08:34 AM
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Paul Haese
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Join Date: Jan 2009
Location: Adelaide
Posts: 9,628
Like Rick I have noticed that invariably there is some gradient in the sky brightening caused from very high thin cloud. Using any of those subs affects the overall processing of the data and it is better to not use them. The use of such subs is worse in very faint objects.

Though if you don't have the luxury of collecting more data you can always use those subs and handle things via software to an extent.
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