Has anyone out there tried a 16mm UWAN on an f5-ish dob as I have just ordered one for my16''F4.9 Dob and will cancel if its not good at this focal ratio. BTW I have just bought a 36mm Observatory Seibert after fabulous views borrowing someone else's on my scope. It suits my needs more than a 31 Nagler or the 28 UWAN as it's nice and light. It's pretty much as the reviews say on CN.
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