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GSO 1/14 wave 62.5mm minor axis secondary mirror Sold!

Price - $66.00

Ad Number: 106059

Posted: 18 May 2017

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HI I bought this for a project and never used it. I had it tested and it came out to be 1/14 wave flat with a slightly rolled edge- and I was told to mask part of the edge (or not) and it would be a good mirror ( I think the term was acceptable). As mentioned, its 62.5mm, or 2.46". Its about 1/2" thick- It is in the box from GSO/Agena Astro never used, and only removed by mirror testing company---read on.

I am enclosing the interferogram diagram for your reference. These sell new from Agena Astro for 60$, plus ship which is exactly what I will sell it for. ( I paid 60$ plus 6$ shipping for it earlier this year and its still new in the box) EXCEPT---it has test results. You can roll the dice and buy a "new" one from Agena Astro --they only say that they are guaranteed to be 1/12 wave flat, or buy mine which is better than that and is a known quality.

Here is the direct quote from the tester. I think in mirror testing jargon, they are very impartial and unbiased so they are not going to say "wow its a fantastic mirror"===no, they will just tell you if its acceptable or not and why. So that is exactly what he told me, direct and to the point. For 66$ its a great mirror- a known (better) one in this size is 229$- from several sources so to get one like this for 66$ is a bargain.

Hi Mark,
I tested your mirror and it's acceptable. Approximately 1/14th wave flat so it's not a bad mirror.
Attached is the picture of the interferogram. The edges are rolled a bit but just mask it off or leave alone.
I'll get it boxed up and sent back to you.


  • Condition NEW
  • Location phoenix az

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