RE: [digital_astro] Orion short tube

From: gregharp_at_antispamdomain.not
Date: Tue Nov 25 2003 - 16:03:55 EST


Bob,

I have the Celestron 80 "Wide View" which is the same OTA and focuser as the
Orion ST80, if that's what you're referring to. These are made by the
Chinese company Synta. They're also available from Apogee and ScopeStuff at
prices ranging from $120 to $200 with different accessories. I use mine as
a guide scope.

The stock 1.25" focuser on this scope has a built-in T-thread, so you should
be able to attach any camera to it fairly easily. I haven't tried this yet,
because I have higher quality optics in this focal length. I suspect that
for photographic purposes the quality of the optics on this fairly
inexpensive achromatic refractor will leave a bit to be desired,
particularly in the area of chromatic aberration. It's no Televue. :) But
it can not be beat for the price, as a portable wide field visual scope.

However, I don't want to discourage you (or anyone) from experimenting. At
some point I plan to try it out myself, as a comparison, since it's 1/3 of a
stop faster than my 70-200mm f/2.8 lens with 2X tele-converter.

There are two Yahoo groups that might interest you regarding this scope:
the "80f5" group and the "Chinese_Refractor" group.

--Greg

> From: reim58 [mailto:reim58_.at._yahoo.com]
>
>
> Back on the subject of imaging a larger FOV since it looks like a 3.3
> focal reducer may not give good results with a D60. Has anyone tried
> using the Orion short tube with a D60/10D camera and if so how did it
> work out. I guess the first question should be can you even mount a
> camera to this telescope (prime focus). If it works then I would
> mount it to my LX90.
>
> Thanks.
> Bob Reim

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