For anything closer than infinity, you need to be able to rack the eyepiece out. Put your shortest focal length eyepiece in the focuser, then back it out just a bit to be safe. Your longer focal length eyepieces should work just fine as long as you have enough travel in your focuser. Wayne A. Sumner Math/Physics/Astronomy/Engineering Boy's Tennis Coach Northridge High School Davis School District (801) 402-8610
Mark Shelton 04/28/11 4:31 PM >>> Hello all, I am just getting ready to cut my trusses for the dob I am making. The question I have is where to make the eyepieces I have come into focus. I have read that you use a 2" eyepiece racked all the way in and cut your trusses when it just reaches focus. Then I ready just the opposite. You should cut your trusses so everything is in focus with your eyepiece racked all the way out.
What are your feelings on the matter. I feel I should make eyepieces come into focus in the middle of the travel of the focus-er. ?????? Thanks for your help in this matter. Mark Shelton _______________________________________________ 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