Thread: Is my primary mirror beyond saving?
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Old 02-06-2016, 09:08 AM
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Satchmo
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Quote:
Originally Posted by TomShirley View Post
Here's the current state of the primary in a single image:https://imgur.com/GZNDk9W
Shine a light through the back to see if you have pinholing ....

If its a GSO or the like it is not uncommon to get only a few years out of the coating .
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