Re: ATM Astroscan Houghton

["Bill Kelley" <flex@commspeed.net>]

>
> At 09:24 AM 12/9/2002 -0800, Bob May wrote:
> >
> >Yep, the Astroscan primary mirror is indeed a spherical mirror.  The
scope
> >is a Schmidt Newtonian and the glass plate on the front should be a
Schmidt
> >corrector plate.  If it isn't then there is a problem with the production
> >line there at Edmund.
>
> I don't think this is correct Bob.  I believe the Astroscan has a
parabolic
> primary mirror and that the glass plate is simply a window.  (If I
remember
> right, this is what Edmund says too.) I took one a part and tested it and
> can assure you that the primary was a paraboloid -- at least in that one.
> (Actually, it was pretty good too, for that matter.)  That's not to say
> they haven't changed the design, but your post is the first I've heard of
> it being s Schmidt Newt.
>
> Gary Seronik

I purchased a few ( sold to me as)  astroscan mirrors. They were
parabolized.
Bill Kelley