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Old 19-03-2009, 05:27 PM
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bojan
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Join Date: Jul 2006
Location: Mt Waverley, VIC
Posts: 7,105
I have Coulter Optics 10" mirror that I bought 1982. It was coated wit SiO, I think
Still OK... just minor blemishes on edges, but this does not (visibly) affect the image quality.

Last edited by bojan; 19-03-2009 at 05:44 PM.
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