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  #1  
Old 05-03-2006, 09:34 PM
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mick pinner
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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?
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  #2  
Old 05-03-2006, 10:12 PM
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janoskiss (Steve H)
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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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