21 Apr
2008
21 Apr
'08
3:36 p.m.
Kurt, Bryan Greer (Protostar) may have the secondary holder you are looking for. http://www.fpi-protostar.com/ Daniel's V-block method for checking laser co-axialism with the barrel is simple and sound. I must add that when I use a laser for collimation, I still base my final, critical adjustments (if needed) with a star-test- now there's a dirty word for you. I've been recommending Dick Suiter's book for years (Star-testing Astronomical Telescopes) and still do. Judging a diffraction pattern can be a difficult thing to do for many people, but if you can, you will possess a powerful tool, independant of commercial gadgetry.