A rangefinder is a device that measures the distance from the observer to a target, in a process called ranging, generally used with a camera or gun.
All rangefinders, whether designed for bowhunting, rifle shooting, golf, or some other outdoor sport, work basically the same way.
Once you “aim” the rangefinder at your intended target, you push a button on the device. The rangefinder then emits a narrow laser beam. That beam travels downrange, bounces off the targeted object, and then travels back to a special sensor located on the front of the device.
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