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mick pinner
05-03-2006, 09:34 PM
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?
janoskiss
05-03-2006, 10:12 PM
Nope. It's just a beam splitter, so no effect on f ratio. Half the light goes to one eye, half to the other.