From: "Richard F.L.R. Snashall" 
To: ATM List 
Reply-To: "Richard F.L.R. Snashall" 


(YAAD -- Yet Another Amateur Design ;-)

I deemphasized off-axis correction and ended up with:

        http://users.rcn.com/rflrs/quad2-01x.len

a 200 mm f/8 visual telescope.  I thought it might be interesting in that,
in the active photopic region, the three nulls are all better than
lambda/45 P-V and the F-C color correction is 1 part in 29,200.

Now, if the glass could be found in the quality necessary...

--
Rick S.
http://users.rcn.com/rflrs

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