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Re: [ATM] Aplanatic Gregorian (was: 25" mirror possibilities)
On Thursday 25 November 2004 02:45 pm, Richard F.L.R. Snashall wrote:
> Aplanatic with only 21.5 percent secondary size at 40+ mm field size.
Uncle! In my defense, I wasn't thinking about such a slow system, and if you
compare secondary size to any other cass you will find it's quite a bit
larger. However, I apologize unequivocally for making generalizations.
Clear(er) skies.
--
Michael Lindner
http://www.starastronomy.org *** http://home.att.net/~mikel
http://www.atmsite.org *** http://www.atmlist.net
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