- 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.
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
Garboreggg adjusted a second control that was something like a range-finder.Raiders of the Universes
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
And first it may be stated that the range-finder is largely a measure of mere economy.Steam Steel and Electricity
James W. Steele
Once more came the signal into the turret from the range-finder.Two Boys of the Battleship
Frank V. Webster