"Brian Tung" wrote in message
...
Michael A. Covington wrote:
However, the 2-inch back will not swing between the back of the tube and
the
base.

The dovetail plate on the C5+ allows some adjustment for this. I don't
know if that's possible on your vintage orange-tube C5.

No...

Thanks for the little report on the 2-inch back for the C5. I wasn't
aware of anyone who had used it.

Glad to be of service. The other problem with the 2-inch back and eyepieces
is that the telescope was very out of balance. The f/6.3 compressor and
1.25-inch back works much better.

My C5 is so old that I had to special-order it with a 1.25-inch back. By
default it came with a 0.965" one.

--
Clear skies,

Michael Covington -- www.covingtoninnovations.com
Author, Astrophotography for the Amateur
and (new) How to Use a Computerized Telescope