Thread: After a good Sky glow filter for ASI1600MC
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Old 15-06-2017, 08:17 PM
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Camelopardalis (Dunk)
Drifting from the pole

Camelopardalis is offline 		 
Join Date: Feb 2013
Location: Brisbane
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@f/4 you should still be OK with the 1.25"...I've used my 1600 with a Canon f/4 lens wide open and didn't see any obvious vignetting. Just make sure your filter wheel is right in front of the camera and any spacers are scope side.
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