I'm not so sure it is, I don't see any other symptoms of astigmatism.

Dan

"Martin R. Howell" wrote in message
...
Chuck Taylor wrote:

Sounds like astigmatism rather than collimation problems.


Yes, it does. My little Meade 4500 had the same symptoms and I was able
to greatly reduce there effects by relieving the pressure exerted on the
secondary by its retaining "lipped" holder which turned out to be
pressing too tightly against the little mirror.


--
Martin R. Howell
"The Astro Post"
www.theastropost.com