[erick (Eric)]

Originally Posted by peter_4059

you need a set of these:

http://www.parallaxinstruments.com/ring.htm

US$450! Gulp! Cost more that the whole OTA! But that is exactly what I want! Thanks - more ideas for a home-built solution.


EDIT: Thanks big time. I've just googled "rotating rings for telescope" and I have a swag of ideas to consider!