How to Choose a Range Finder

Rangefinders take the guesswork out of calculating the distance between two points. Reflection rangefinders calculate distance by bouncing a laser beam, sound waves or radio waves off a reflective surface. They are often accurate within one yard, depending on the distance. Laser rangefinders are the most common of the reflective rangefinders. Optical rangefinders use an eyepiece and mirror to measure distances with accuracy within 5-to-10 yards. GPS Rangefinders use the Global Navigation Satellite System to determine the exaction location of points within 1 inch.

Instructions

    • 1

      Determine the main use for which you need a rangefinder. Some uses require precise accuracy, while others allow for a margin of error in distance calculation.

    • 2

      An optical rangefinder is helpful for estimating distance -- and determining the needed lens -- when focusing a subject in photography. Optical rangefinders are less expensive than reflective and GPS rangefinders. Precise measurements are not needed.

    • 3

      Select a laser or other reflective rangefinder for calculating the range for a shot in golfing and hunting. These rangefinders are accurate within 500-to-600 yards. They provide accuracy within one yard, so long as a surface reflects well from that distance.

    • 4

      Choose a GPS rangefinder for long-range golfing and hunting calculations; accurate measurements are within inches. The accuracy of reflective rangefinders decreases with distance.

    • 5

      Purchase a precise, GPS rangefinder for applications like surveying land.

    • 6

      Review the range capabilities of each rangefinder you are considering. Some rangefinders are only capable of measuring short distances, and require the object to be a minimum distance away. Other rangefinders can measure short and long distances with ease.

    • 7

      Determine the type of extra features that are needed. These include adjusting for slope, measuring degree of vertical tilt, score keeping and accounting for obstacles and design features like camoflauge. Some rangefinders are made especially for use in golfing. Others are specially designed for hunting applications.

    • 8

      Consider your budget when selecting a range finder. Rangefinder prices -- as of 2011 -- vary from about $50 up to $500 or more, depending on the features.