I'm not sure if this is a crayford helical or not, but I have a KineOptics
HC-1 helical focuser on my 8" string scope and am very impressed with it.
Very smooth motion, with the ability to do very fine focusing. Also
relatively inexpensive and light weight.
http://www.kineoptics.com/HC-1.html
-- Craig
> -----Original Message-----
> From: sf-bay-tac-bounces@No-Spam [mailto:sf-bay-tac-bounces@No-Spam]On
> Behalf Of Mark Bracewell
> Sent: Tuesday, April 05, 2005 12:23 PM
> To: The Astronomy Connection
> Subject: [TAC] Helical crayfords?
>
>
>
> I'm curious about this design, anyone have opinions,
> experience with them?
Received on Tue Apr 5 13:49:46 2005