Thread: Help on a Newtonian GSO 12" f/4
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Old 20-09-2012, 09:50 AM
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barx1963 (Malcolm)
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barx1963 is offline 		 
Join Date: Nov 2008
Location: Mt Duneed Vic
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Also check that the mirror clips are not too tight on the primary mirror. This can introduce astigmatism in the primary.

Malcolm
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