Thread: Mirror quality question, GSO/skywatcher
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Old 29-11-2011, 06:15 AM
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Merlin66 (Ken)
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Merlin66 is offline 		 
Join Date: Oct 2005
Location: Junortoun Vic
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Get someone with a Ronchi grating to take an image of the optics...this will quickly show if they are good or not.
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