Re: [ATM] Mersenne \ Re: Looking for information on a telescope design

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

Actually, all you need is a pair of apertures to select which
view that you need.  One is a central hole which provides the
main view and the other is the inverse of that, a ring aperture
fr viewing the finder field!  A simple slide or flag mechanism
can support the  two apertures and be easily selectable.
Bob May
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