While hunting and golf rangefinders don't provide quite that level of precision, they are far superior to optical models. Given that the speed of light is roughly 186,000 miles per second, readings are almost instantaneous.High-end laser rangefinders can be accurate to 1/10th inch, at a mile distant. They bounce a beam of light (visible or infrared) off an object, and time its return in order to calculate distance. Laser rangefinders (LRFs) first appeared on army tanks in the 1960s. As you seldom play golf or hunt in a vacuum, it's a system that never gained great popularity! Laser rangefinders Wind, traffic, even birdsong, can all affect readings. It's the same basic principle as a laser. Ultrasonic rangefinders project a sound wave, then measure the time taken for the wave to return from the target. By World War II, “coincidence” rangefinders were widespread. During World War I they were adapted for judging distance and elevation for land-based and naval artillery. Early models – theodolites – were used for surveying. Optical rangefinders of one kind or another have been around for well over a hundred years. There are three types of rangefinder available: Best results come from buying a function-specific model. ![]() Although golfing rangefinders can be used for hunting, and vice versa, they are different.
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