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Leslie Peltier's 12" Alvan Clark Finds a New Home

Started by jragsdale , Apr 10 2024 11:01 AM

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128 replies to this topic

#126 jragsdale

Aurora

topic starter

Posts: 4,601
Joined: 07 Dec 2015
Loc: Idaho

Posted 10 December 2024 - 01:40 PM

Had the 10" flat Zygo tested to insure that only the highest quality flat will be used for making this folded refractor. Sent to Russell Optics in Vermont, they charge $15/inch to run a flat through their Zygo test and generate an interferogram, which seems like a great deal if you really want to test an unknown flat. Couldn't be happier with the results; ~1/20 wave PV and >1/100 wave RMS. This flat is definitely worthy!

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#127 rwiederrich

Goldfinger

Posts: 13,657
Joined: 17 Nov 2005
Loc: Gorst Washington(center of the Universe)

Posted 13 December 2024 - 02:16 PM

Oh My. What an adventure you have undertaken. Lots of elements have to come into alignment. the Clark lens is amazing...Like to see more images of it....the first looked a bit foggy.

I'll surely be following along. What are you considering mounting her on?

Rob