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Gordon Rayner
scholastic sledgehammer
Reged: 03/24/07
Posts: 965
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Re: Compact refractor
07/03/09 07:55 PM
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Have your seen the folded refractor in AMATEUR TELESCOPE MAKING, edited by Stephen F. Tonkin, from Springer?
I have two 10 5/8 inch airspaced doublets, in cells, f/10, and am considering making such an instrument( and in selling the other lens).
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