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Old 28-11-2020, 10:54 AM
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Camelopardalis (Dunk)
Drifting from the pole

Camelopardalis is offline
 
Join Date: Feb 2013
Location: Brisbane
Posts: 5,256
I use an ASI1600MM, which is only slightly less in diameter than the 294. With my Esprit 100 at f/5.5 the vignetting isn’t noticeable. With my Quattro at f/4 it is. The light cone is just that bit steeper at f/4.

So I think it will depend on the focal ratio of your scope...
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