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Data
Very good data Bratislav, interesting and educational, great link, thanks.
Based on this I would expect, at least for visual use, more FLP-53 doublets to perform on par with the few CaF2 based doublets around (old Vixen and old and new Tak) but that seems not happen to often. I wonder why.
Last edited by PeterHA; 23-05-2014 at 01:20 PM.
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