Thread: overcorrection undercorrection: what is it?
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Old 18-07-2005, 07:26 PM
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asimov (John)
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Join Date: May 2005
Location: Bundaberg
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And I guess to alter or fix the fault, would be to have the mirror or len's sent away to be re-figured.....or to mask the mirror/lens down to a smaller aperture?
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