21 Apr
2008
21 Apr
'08
8:38 a.m.
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!