Telescopes: Guides & Recommendations

Optical Aberrations at the Telescope — And How to Avoid Them

Optical aberrations limit the performance of an eyepiece. Here are seven common problems, with solutions where applicable.

Magnifying Lens

Telescopes: Guides & Recommendations

Common Telescope Magnification Myths

Answers to some of the most common misconceptions about telescope magnification.

Choosing Your Astronomy Equipment

Telescope Eyepiece Guide

A telescope is only as good as its eyepiece — and a good one can make a big difference. Here's a quick look at the different types of eyepieces available.