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how to find the correct allignment of a doublet lens

(6)
Charles, Before you dis-assemble your objective, you should perform the star testing first, so you have a base line. Sketch or photograph a bright star ,before
paul valleli
6
posts
Aug 15

Waineo Elgin grinding machine-need help

(4)
On Sun, Jul 23, 2017 at 7:48 AM, jhavens@evansville.net [atm_free] < ... Greetings I likely shouldn't be speaking for Mel but I just know that if you ask
o1bigtenor
4
posts
Jul 23
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