[Chaos-l] Guide Scopes and Such

[Stewart-Taylor, Jon]

Hi Robert.

> [What about using] a "cheap" (roughly $75-$100) 
> refractor [as] a guide scope. [...]If I get
> mounting rings [...]I should be able to use 
> those later as well.

If you have the $100 to waste, and the rings will work with your later
guide scope, i'd so go for it.  It'll be a fairly cheap way to see if a
guide scope works for you, and even if you decide it's not you can
resell the rings. 

Be careful of the eyepiece diameter, though.  Dunno if you can get a .95
eyepiece of high enough quality to guide with which won't cost more than
the guide scope, and you definitely wouldn't be using that eyepiece for
anything else.  Maybe you can just add a cross-hair to the existing
eyepiece using spiderweb or some other fine thread.  Sounds like a
pretty persnickety job, though.

J.
-- 
Jon Stewart-Taylor: joncst at earthlink.net; 919-967-2912	
Chapel Hill Astronomy: http://rtpnet.org/chaos/	
Light pollution information: http://www.ncdarksky.org/