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Re: Primary Mirror --- HELP!!

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Posted by dwayne/">dwayne on January 7, 1999 12:19:28 UTC

That depends on how you define "good" and "cheap". The primary mirror is a bad place to skimp on a telescope. You might find an item like this at Astromart from time to time, and Orion has an 8" f6 mirror in their catalog from $200 -$300 depending on whether you chose pyrex and enhanced coatings. I met a guy at a star party last summer who had a great 20" f4 that was home built. He told me he had bought the mirror at a really good discount from the manufacturer because it had a slight chip on the edge. The chip did not affect the performance but because of it the manufacturer could no longer get anywhere near full price for it. I doubt you will find damaged mirrors advertised as such but if you email a few manufacturers and tell them that you are intereste in such an item you might get a good mirror for very little.

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