Re: ATM paramythioti telescope

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

Opening: 160mm (optimal for the average turbulence of the European sites, of
which the parameter of Fried did not depasse 13cm).
 Focal: 960mm; F/D = 6. 160mm diameter of the primary mirror
Apparent field: 1º primary
Miroir: spherical secondary (Note misspelling doesn't go through the
Altavista babelfish very well!)
Mirror: spherical
central Obstruction: 23% (in proportion in diameter of the primary mirror)
~37mm secondary
Resolving power: 0.72 "
Minimal enlargement: 30x
maximum Enlargement: 360x
Tube out of carbon fibre: length 54cm out of prototype, and 42 or 34 cm in
final version.
Tube-lengthen with the sliding ring 50.8mm with an carry-eyepiece with the
sliding ring 31.75mm.

There are no indications here of the distance between the primary and
secondary nor of any parts of the corrector lenses.  I might note that 420mm
is a bit short for a tube length as the 23% secondary won't accept a 1deg.
beamwidth anything shorter than about 750mm.  Anything near a 600mm spacing
won't accept a full onaxis beam either.
You are going to have to get rid of the spherical abberation with the lenses
and since they don't have any power, you probably won't have any real color
problems.  I might note that a convex spherical surface produces more
spherical abberation as the curvature increases.
All in all, there's a lot of info missing!
Bob May
My new web space address is http://webu.wigloo.com/bobmay/ or
http://nav.to/bobmay
and my new email address is bobmay@nethere.com
Bob May