Re: ATM Cave Optics: Newtonian vs. Cassegrainian

[andyman@tiac.net (andyman)]

Uh, do you have a cheap 12.5" Dall-Kirkham you would sell me?  

Andy


>Cave Optics: Newtonian vs. Cassegrainian
>
>Val Germann
>Central Missouri Astronomical Association
>
>One of our club members has had an 8-inch Cave Newtonian
>since the late 1960s.  It is great.  Another of our members
>bought a 12.5-inch Dall-Kirkham from them in 1973 and,
>well, the telescope was a disaster.  This instrument was
>given to the group about ten years ago and we tried and
>tried to make it work, to no avail.  The primary problem
>with an instrument like this, over and above the waste of
>money involved, is the fact that the owner's time and
>valuable emotional energy are absorbed in trying to make
>the expensive investment pay off.  Years later, in many
>cases, one and all give up, accepting the loss.  But in
>many cases they are never the same again.
>
>VG
>
>