Definition of range finder
1 : an instrument used in gunnery to determine the distance of a target
2 : a surveying instrument (as a transit) for determining quickly the distances, bearings, and elevations of distant objects
3 : a usually built-in adjustable optical device for focusing a camera that automatically indicates the correct focus (as when two parts of a split image are brought together)
First Known Use of range finder
Learn More about range finder
Britannica.com: Encyclopedia article about "range finder"
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