Thread: Making a Busack-Riccardi-Honders Astrograph
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Old 20-04-2017, 09:50 AM
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Merlin66 (Ken)
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Join Date: Oct 2005
Location: Junortoun Vic
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Could you use the Enrique Gaviola method?
I used it when making a Cass secondary many years ago....
(See "Advanced Telescope Making Techniques", Vol 1, p63)
Ken
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