Chuck, I just use my Starfish autoguider with a MiniBorg guide scope. I don't swap out an eyepiece because there really is no need. I find and frame the selected object on the main camera chip, and then take an image with the autoguider. I nearly always have many suitable guide stars to choose from on the guide camera chip. I just pick one... calibrate the guider with MaxIm (which takes about 1 minute) and start autoguiding. I have much better luck with a separate guide scope than I had when guiding through the filters. The filters made it much harder to find a guide star, especially when using a narrowband filter. The separate guide scope is much better, but bring in the possibility of differential flexure between the guide scope and the main scope. It requires a really solid mounting arrangement and a good scope (mirror that doesn't flop around, etc.). That is my 2-cents worth. Tyler -----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Chuck Hards Sent: Thursday, March 31, 2011 11:48 AM To: Utah Astronomy Subject: [Utah-astronomy] Autoguider use I'm curious as to what the seasoned imagers on the list use when selecting a guide star, specifically, swapping an eyepiece parfocal with the autoguider, or a flip-mirror? I'm also guessing that Newtonian users don't have the back-focus to use the flip mirror. Thanks! _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php