Re: [APML] Refractor Guidescope Suggestions???

[Chris1011@aol.com]

In a message dated 8/4/2001 10:49:48 PM Pacific Daylight Time, 
KGKIRKLEY@aol.com writes:


> Are the groves wide enough for the delrin tips of Losmandy Rings, like the 
> DR125's?
> Or are they only useable with the AP rings?
> Are the tips of the screws of the AP rings metal or a material like delrin?
> Kent


Stay away from Delrin tips. They will move on you as the temperature changes. 
The expansion co-efficient of Delrin is very high. Delrin also creeps 
slightly under pressure. Use metal tips in any guide scope you use for 
astro-photography.

Roland Christen