Telescopic sight

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A telescopic sight, commonly called a scope informally, is an optical sighting device based on a refracting telescope.^[1] It is equipped with some form of a referencing pattern – known as a reticle – mounted in a focally appropriate position in its optical system to provide an accurate point of aim. Telescopic sights are used with all types of systems that require magnification in addition to reliable visual aiming, as opposed to non-magnifying iron sights, reflector (reflex) sights, holographic sights or laser sights, and are most commonly found on long-barrel firearms, particularly rifles, usually via a scope mount. Similar devices are also found on other platforms such as artillery, tanks and even aircraft.^[2][3] The optical components may be combined with optoelectronics to add night vision or smart device features.