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range finder

or range·find·er

noun
  1. any of various instruments for determining the distance from the observer to a particular object, as for sighting a gun or adjusting the focus of a camera.
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Origin of range finder

First recorded in 1870–75
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for range finder

Historical Examples of range finder

  • Garboreggg adjusted a second control that was something like a range-finder.

    Raiders of the Universes

    Donald Wandrei

  • The range-finder and switch were on a ledge at one of the windows.

  • Just carried on with that sketch of Hopkins at the range-finder.

    A Case in Camera

    Oliver Onions

  • And first it may be stated that the range-finder is largely a measure of mere economy.

  • Once more came the signal into the turret from the range-finder.