World War II era Optical Rangefinder (Tanks/Battleships/Artillery)
cults3d
A coincidence rangefinder or coincidence telemeter is a type of rangefinder that uses mechanical and optical principles to allow an operator to determine the distance to a visible object. There are subtypes split-image telemeter, inverted image, or double-image telemeter with different principles how two images in a single ocular are compared. Coincidence rangefinders were important elements of fire control systems for long-range naval guns and land-based coastal artillery circa 1890–1960 This is an almost fully 3D printed optical rangefinder with a measurement range of up to 5km. All non-3D printed parts are screws/bolts, a mirror, and two tubes from Home Depot. The build tutorial: https://youtu.be/W9nBdSC7Row
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