Thread: crayford bk7
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Old 17-07-2005, 11:22 PM
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davidpretorius
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davidpretorius is offline 		 
Join Date: Jun 2005
Location: Launceston Tasmania
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crayford bk7
Hi all, i assume with andrews ltd 10" and 12" dobs that the crayford is a good quality focuser? Are they worth the extra

and what is the BK7?
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