Patrick, I noticed you mentioned something about corners having problems because you used a reducer -- or did I imagine that during a 60s flashback? Anyway, I discovered recently that it makes a huge difference if I don't have the reducer and the ccd chip separated by the required distance. In my case, I need 100 or 105 mm between them. Best wishes, Joe ________________________________ From: Patrick Wiggins <paw@wirelessbeehive.com> To: utah astronomy utah astronomy listserve <utah-astronomy@mailman.xmission.com> Sent: Tue, May 11, 2010 10:49:16 PM Subject: [Utah-astronomy] M-97 / M-101 I've got Tyler's versions of my recent M-97 and M-101 data posted. http://www.slas.us/gallery2/main.php?g2_itemId=68&g2_page=5 He does have a magical way with processing data. patrick _______________________________________________ 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 Visit the Wiki: http://www.utahastronomy.com