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Thanks again everyone. Alistair; I got close to the same amount of
detail with one 20 sec sub @ 6400, but it was, of course noisy, so I
am attempting to get the ISO down to 800, but I can certainly try 3200
and see how it comes out. Even this 1600 image is quite noisy. Maybe
it'll improve in coming months as the ambient drops.
raymo
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