A telescopic sight, commonly called a scope, is a sighting device that is based on an optical refracting telescope. They are equipped with some form of graphic image pattern (a reticle) mounted in an optically appropriate position in their optical system to give an accurate aiming point. Telescopic sights are used with all types of systems that require accurate aiming but are most commonly found on firearms, particularly rifles. Other types of sights are iron sights, reflector (reflex) sights, and laser sights.
The first experiments directed to give shooters optical aiming aids go back to the early 17th century. For centuries different optical aiming aids and primitive predecessors of telescopic sights were created that had practical or performance limitations.
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Bushnell Corporation, also known as Bushnell and Bushnell Outdoor Products, is an American company specializing in optics and imaging. Its products include binoculars, spotting scopes, telescopes, night vision equipment, GPS devices, laser rangefinders, riflescopes, holographic weapon sights, game cameras and other high-end optical equipment. The company also sells Bollé Performance Eyewear ski goggles and sunglasses (which includes the H20 Optix sunglasses brand), and Serengeti Eyewear all-purpose sunglasses.