Re: ATM Cassegrain as 2nd project / optics calculations

[GregJ888@aol.com]

If you know about what you want I can run a design for you with the Rutttan Software or with Oslo.  RC, Classical or Dall are pretty easy even by hand.  Please send the info offline.

Would suggest anyone looking at a Cass to check Peter Smith's site.  He has some wonderful info on testing and on field correctors.

   www.users.bigpond.com/pjifl

Of interest are the corrected Dall and Classical designs.  Yes, the RC is "better" but much harder to make.  

Greg Jones

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