Thread: crayford bk7
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Old 17-07-2005, 11:24 PM
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elusiver
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elusiver is offline 		 
Join Date: May 2005
Location: Ferntree Gully
Posts: 433
bk7 is better then pyrex, and is what the primary is made of. The crayfords are the way to go in terms of a focuser.. alot better than the standard r & p.

el
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