Re: [APML] R200SS was: 8" Reflector decent enough for prime focus AP?

[Herm <hermperez@worldnet.att.net>]

"Shekhar Borde" <shekhar@prodigy.net>  wrote:

>
>Do any of the Vixen scopes take OAGs or filters?

I think they are designed for guidescopes.. my R200SS is very stout, absolutely
no problems using a quide scope.

>
>I have the R200SS and I like it for the most part.  One minor annoyance
>is that it will not take an OAG (understandable at f/4).

I once modified mine by adding a 2" spacer to the mirror cell, this allowed the
use of a Lumicon newt easy guider and its coma corrector.. worked well but when
I changed my guidescope then I stopped using the off-axis guider and went back
to the guidescope..

> A major annoyance
>is that it will not take a filter.  There is no easy way to insert a filter in the
>light path.  You have to hack something together -- like gluing in the filter
>into the T-ring or devise something like a gel filter holder at the bottom of
>the focuser tube (as Wil Milan did with his Epsilon).

Luckily I can screw a 48mm filter into the end of the coma corrector.. but that
may be possible just with my coma corrector.. you can always glue in a step-down
ring somewhere in the light path.


>
>BTW, I think that Orion has stopped selling (or at least listing) this scope.
>I wonder why?

I just got a Vixen catalog, there is lots of stuff that Orion never showed in
their catalog. They even have a flat field 4" apo that will take medium format,
20um stars over a 90mm circle.



Herm
Astropics http://home.att.net/~hermperez

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