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Old 26-02-2015, 04:29 PM
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multiweb (Marc)
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Join Date: Oct 2007
Location: Sydney
Posts: 22,079
The area of the chip is so small that is very unlikely to degrade the images given by the scope. If you're worried about water getting under the coating, short of recoating the whole mirror, I'd put a drop of black flat paint on the tiny hole to seal it.
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