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All had the reticle illumination drawback common with reflector sights small enough for a firearm: proper ambient lighting could not be depended on and incandescent light bulbs could drain a battery in a few hours. In 1975, the Swedish optics company Aimpoint AB marketed the first "electronic" red dot sight combining a reflecting curved mirror ...
CrossfireX was a first-person shooter and the console version of Crossfire (2007). The free-to-play multiplayer component is similar to Counter-Strike: Global Offensive, which sees two opposing teams, representing two hostile private military factions, compete in game modes to complete objectives.
Stereoscopic rangefinder atop the bridge of the German cruiser Admiral Graf Spee Portable stereoscopic rangefinder with binoculars from WWII. A stereoscopic rangefinder or stereoscopic telemeter [1] is an optical device that measures distance from the observer to a target, using the observer's capability of binocular vision.
Stadiametric rangefinding is used for surveying and in the telescopic sights of firearms, artillery pieces, or tank guns, as well as some binoculars and other optics. It is still widely used in long-range military sniping , but in many professional applications it is being replaced with microwave , infrared , or laser rangefinding methods.
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Eyepiece image of a naval rangefinder, showing the displaced image when not yet adjusted for range. The coincidence rangefinder uses a single eyepiece. Light from the target enters the rangefinder through two windows located at either end of the instrument. At either side the incident beam is reflected to the center of the optical bar by a ...
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