Telescope Buying Guide

Anthony asked:


It’s a DS 2090 telescope, a refractor with 90mm of clear aperture and a focal length of 800mm and the remote is missing so you can’t automatically go to a celestial object. Everything else is there. Also I have never sold or bought anything used so please make some suggestions.

falling_starz asked:


I mean, when it says 10-cm telescope does it refer to its aperture (which, I think, is the light collecting area right?) or its the diameter of the primary mirror (for a reflecting telescope)?

Kainkin asked:


I have a Canon Digital Rebel XTi with the standard 18-55mm lens that has an aperture of 3.5-5.6 I think and was wondering what is the best setting for that camera and lens combination to get the best results for taking pictures of the night sky (in terms of shutter speed, aperture, white balance, etc.). I do have a tripod but it is not equipped to move with the planets–no equitorial mount if that is what it is called. Also, I would like to get an inexpensive but still nice additional lens that may be better suited for astro-photography without a telescope, any suggestions?