Polar Alignment

A polar alignment is a small finderscope, often mounted in the polar axis of a German equatorial mount telescope, that helps line up the mount on the north celestial pole for accurate tracking during astrophotography. A polar alignment scope is generally not needed for casual visual use, as a rough alignment on Polaris (which is about 0.8° away from the actual pole) is usually more than accurate enough for visual observing.

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