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M7
l've been trying some extra long exposures to see how it effects noise levels. Thought l would post this to get a few of the gurus opinions so any thoughts appreciated.
Canon 400D unmodified @ iso 400
Megrez 90 with 0.8 W.O Reducer and Baader UHC-S
1 X 20 min exposure.
Last edited by mick pinner; 25-07-2009 at 10:42 PM.
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