Further to my last post - it appears you can guide and image with a DSI. I stand corrected : See this posting of FAQ from the following web site but as usual there is a cavette.
http://www.skyinsight.com/wiki/index...pSkyImager_FAQ
Guiding, Tracking, and Guiding while imaging
From: Chuck Reese (chuckr54)
Date: Oct 6, 2005
Subject: Re: Help Track and Image at same time
Perhaps the most confusing set of terms & features with the DSI :-)
"Can Guide" means the system will guide using the GPS command set.
"Can Track" means the system will guide using the Classic command set.
Both work the same from the user perspective - there is no meaningful difference in the end result.
"Guide and Image with the same camera" does work. However, guide commands are issued *between exposures*, not *during exposures*. This is useful for keeping an object centered on the chip over an imaging session if our sidereal tracking is a bit off, or our alignment is less than perfect. It will *not* correct PE during the exposure, which is what we usually think of when we use the term "autoguiding".
The StarMate (LX200 Emulator) is reported to work just fine with all the above features using the Classic command set ("Can Track").
You do learn something every day.