Telescope Buying Guide

Chiemeka Utazi Chichi asked:


Reflecting telescope makes use of a concave mirror in place of the objective lens to bring a distant object onto focus. What is the magnifying power of a telescope that has a mirror with 250cm radius and an eye piece, whose focal length is 5.0cm?

blackberrydude117 asked:


A telescope with an objective lens that is converging and the eye piece is diverging. Would the diverging lens be inside the focal point etc?

BookLovr5 asked:


My father-in-law just gave me his old Meade ETX-60AT telescope. The problem is, it’s missing both eye pieces and user manual. I managed to download the user manual but the eye pieces are still eluding me. How would I go about getting replacements? Do the eye pieces HAVE to be the same brand? It came with a 25mm (1.25″) and 9mm lenses, do I HAVE to get these or can I choose others? How will I know what I buy will fit in my telescope? I’m new at this and could sure use the help.
Do I have to have a Meade eyepiece or can I purchase a different brand?

dealerschool2000 asked:


I have a meade 4.5″ reflecting telescope, but images are seen upside down.