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Beautifully sharp and detailed. I like the colour.
By the way I use 6-8 second guide exposures on an AP1600. Same on a PME.
3 seconds may be a bit short as you can end up chasing the seeing and 6 seconds tends to even the seeing out. On a high end mount like an AP Mach 1 longer exposures are possible. Shorter ones are usually needed on lesser mounts with higher errors.
Greg.
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