Re: [ATM] Cassegrain vs. Gregorian (secondary testing) Best ofBothWorlds

["Bob May" <bobmay@nethere.com>]

Interesting thing about the Newt/Cass setup is that you can setup the
primary for the R/C Cass with a primary of slightly overcorrected (I usually
see numbers in the -1.05 or so) surface and this is perfect for the Cass
while fairly good for the Newt.  The end result of the difference between
the two is really quite small and still within a 1/10th wave error on the
wavefront of the scope from a quick check with TEX for the change in
numbers.
Bob May
http://nav.to/bobmay
bobmay@nethere.com
NEW! http://bobmay.astronomy.net


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