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05-03-2006, 09:34 PM
mick pinner
Astrolounge
Join Date: Feb 2005
Location: monbulk-vic
Posts: 2,010
Binoviewer Question
l am l right in assuming that a binoviewer halves the focal length of the scope.
eg: f/10 fitted with binoviewer becomes f/5?
mick pinner
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05-03-2006, 10:12 PM
janoskiss
(Steve H)
Registered User
Join Date: Jan 2005
Location: Sale, VIC
Posts: 6,033
Nope. It's just a beam splitter, so no effect on f ratio. Half the light goes to one eye, half to the other.
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