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Glenn Chaple's observing basics: Finding the right finder

May 2007: Learn about finder scopes market and how to align your finder scope.
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 6x30 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 8x50 finder.

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