A rangefinder is a device that measures distance from the observer to a target, in a process called ranging.
Active methods use unilateral transmission and passive reflection. Active rangefinding methods include laser, radar, sonar, lidar and ultrasonic rangefinding. Other devices measure distance using trigonometry (stadiametric rangefinders and parallax, or coincidence rangefinders).
For more information regarding rangefinders please call
CRM Gun Sports on: (07) 4031 4440