I don't have any experience with it, but I do know after shopping for a new focuser that Jim's Mobile (JMI) sells digital read-outs that can be installed on a focuser. This presumably allows you to set/keep the focuser to a setting accuracy down to 0.01mm. Here's the URL: http://www.jimsmobile.com/dro_data.htm It's too bad CCD cameras don't auto-compensate for inaccuracies like an eye can. In fact, this actually brings up a question. Does anyone have any tips for visually achieving true focus. I find I sometimes have difficulty with this when I am trying to get the scope in focus at a star party for people to view an object. Usually I can look away from the eyepiece briefly & look back but sometimes my eye compensates too quickly. This is even worse after swapping to a higher power on a nebula where the surrounding stars are either too dim or practically non-existent with a filter. A nebula isn't exactly the easiest thing to focus on... I wonder if this is a more of an issue for those of us who wear eyeglasses. ---------- From: Patrick Wiggins Sent: Friday, August 16, 2002 12:14 AM To: utah astronomy listserve Subject: [Utah-astronomy] CCD focusing Anyone here have any experience with CCD focusing aids? For those who have not tried CCD imaging, getting a precise focus is not easy... Patrick _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy