Re: [ATM] Cassegrain Secondary Magnification

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

He's more looking at a long FL scope of very short lenght.  A
Lurie at that focal length really isnt' a workable proposition as
the corrector really isn't necessary in such a case as the
spherical primary itself will easily meet the criteria of an
excellent surfacce.
FWIW, I do remember some design done by somebody that was a four
reflection with only two surfaces.  I don't remember where I saw
it but it was pronblably some professional trying to design a
"perfect system" with a high magnification.  Searching through
the ADS list of Journals may pop it up as that may be where I saw
it.  It may have even been an off-axis design.
Bob May

rmay at nethere.com
http: slash /nav.to slash bobmay
http: slash /bobmay dot astronomy.net


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