A rangefinder is a device that calculates the distance between an object and the user. It is often used by golfers, hunters, and archers to improve their accuracy. Rangefinders are also used in other fields such as surveying and construction.
Rangefinders can be either optical or laser. Optical rangefinders use mirrors and lenses to calculate the distance. They are generally more accurate than laser rangefinders, but they are also more expensive. Laser rangefinders use lasers to calculate the distance. They are less accurate than optical rangefinders, but they are also cheaper.
There are a number of factors you should consider when purchasing a rangefinder. The most important factors are price and accuracy. You should also consider the size of the rangefinder, the type of lens, and the type of display.