Thread: 2" filter with pinhole for laser collimating with barlow?
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  #6  
Old 11-01-2013, 11:45 PM
mark3d
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Join Date: May 2007
Location: Adelaide
Posts: 268
Yeah, on the primary mostly. Previously I've just aimed it at the middle of the non-circular shape and it's been OK. Just trying to get a bit more serious with it.
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