I did a lot of tests a while back and my 5% stacks tended to turn out better than my 10% stacks (or greater), which otherwise all seemed about the same to me.
In terms of noise, I didn't notice a huge change (doesn't noise reduction fall off after 33+ frames anyway? Or is that only for Deep Sky objects?). Maybe it's time to experiment again if I ever get the opportunity to point my scope skywards again :-(
Cheers
Markus
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