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| subject: | ATM Quad design |
From: "Richard F.L.R. Snashall"
To: ATM List
Reply-To: "Richard F.L.R. Snashall"
I finally succeeded in finding a combination with a doublet front end.
Color correction is not the best, but it still has a 0.98 photopic Strehl
ratio (175 mm, f/12) and a reasonably flat field (90 m).
http://users.rcn.com/rflrs/aquad1-13x.len
Rick S.
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