Re: [ATM] RC Multiple primaries and a single seconday

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

Yeppie, it's quite possible.  Easiest way is to make a large
hyperboloid for the RC and then cut out the 3 sections you want
for mirrors and then mount them precisely so that they're close
to each other in pointing to the secondary.  The sad thing about
doing this is that you take the simplicity of the original mirror
and just make things much more complex by providing seperate
mountings for each of the 3 sections of the mirror.  You also
lose out on resolution as the 3 airy discs will be larger than
the 1 of the original diameter mirror.  You also lose light
collection.  All in all, you lose if you try to do such a thing.
Now, if you're good at making off-axis sections of  a hyperbola
or parabola, go ahead as you will gain light collection doing
this if you do the largest mirror that you can do.
Bob May
bobmay at nethere.com
http: slash /nav.to slash bobmay
http: slash /bobmay dot astronomy.net
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