Chuck, January 2003 issue. This is by far the best way to collimate a Newtonian. The article also explains that collimating with a laser alone, without the Barlow, can often result in "laser miscollimation". Clear Skies, Don -----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Chuck Hards Sent: Monday, April 21, 2008 8:38 AM To: Utah Astronomy Subject: [Utah-astronomy] Laser collimator Can anyone remember the Sky & Telescope issue that contained Nils Olof Carlin's article on using a Barlow lens with a laser collimator? I have been unsuccessful searching on the S&T Website. Don Colton, you explored this further, IIRC, yes? If someone can cite the issue, I will look it up in my own library. TIA! _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://gallery.utahastronomy.com Visit the Wiki: http://www.utahastronomy.com