Quote:
Originally Posted by pmrid
Hi again David.
I managed a bit of semi clear sky last night and ran up the F7.5 80mm refractor with the ASI290MC just for fun.
It is apparent that, as you seemed to say, aperture rules here. I did a 10minute stack of 30second subs in RAW16 mode and … well it was disappointing really. I was imaging M16 - a good strong Ha source. I registered only a faint green luminosity with very little contrast or definition. OK. seeing wasn’t great but …
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Hi Peter
My curiosity got the better of me last night and I thought I’d see what I could come up with while I was waiting for some other targets to get above the trees... trying to match your system as best I could on m16.
So with an older skywatcher ed80 @f7.5 and my asi290mm mini guide cam I did some 30sec subs unguided for about 13min (piggybacked on my sct so a bit overloaded on the cgem). Was able to get some pretty decent contrast (all be it in b/w) even though I was literally shooting directly into the almost full moon! No filters or any stretching, just the screenshot before post processing.