Thread: Making a Busack-Riccardi-Honders Astrograph
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  #27  
Old 09-12-2016, 10:49 AM
Stefan Buda
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Stefan Buda is offline 		 
Join Date: Jul 2013
Location: Melbourne, VIC
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Well if you think that is a lot of glass then don't forget: That is only half the story. The same number of discs are needed for making the two small lenses.
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