Thread: Making a Busack-Riccardi-Honders Astrograph
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  #76  
Old 20-11-2017, 10:13 PM
Stefan Buda
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Stefan Buda is offline 		 
Join Date: Jul 2013
Location: Melbourne, VIC
Posts: 837
Second CF tube done.
Back plate and front lens housing glued in.
Concentricity and parallelism held to better than 0.006mm on both the front and the back elements.
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