From the May 2007 issue

Glenn Chaple’s observing basics: Finding the right finder

May 2007: Learn about finder scopes market and how to align your finder scope.
By | Published: May 1, 2007 | Last updated on May 18, 2023
You’d be surprised by the finder scopes
available to today’s amateur astronomers. The typical model is an optical finder scope — essentially, it’s a miniature wide-field telescope. The numbers 6×30 signify its magnifying power (6x) and aperture (30mm) and are adequate size to use with a small refractor. For my 13-inch Dobsonian, I use a larger 8×50 finder.