From: Mark Gaffney <markgaffney@mac.com>

Date: August 12, 2008 9:23:40 AM MDT

To: Astro_IIDC@yahoogroups.com

Subject: Autoguiding...

Hi Milton, I`ve just written to Frank from the Autoguiding Yahoo group about guiding using the set-up I had in mind with the Orion Short Tube 80 Guidescope & Astro IIDC. Here is what he said in part; "As for guiding the big C10, I expect the mirror will cause flexure 

problems, so be prepared to see oblong stars at long exposure.  But if 

you keep exposures to 1-4 minutes, and depending on where in the sky 

you are imaging, it may work ok."

Also with respect to using the Unibrain Fire-i webcam as a guide camera; "I guess that camera uses a Sony CCD.  It looks like it is uncompressed 

color camera?  The color isn't ideal for guiding, but non-compressed 

will help." To your knowledge is the Unibrain a non-compressed camera? He says also that PhD has a Mac version. How does it stack up against Astro IIDC for guiding in your opinion? Mark.