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The position of the lenses A and B are known, and the angle of the lenses α and/or β is set by the operator so that both are aimed at the target. Because the distance between A and B on a coincidence rangefinder is typically fixed, once the angle is set correctly the operator need only read the range from the scale.
Klein Tools got involved in motorsports in 1994 to gain visibility with auto racing fans. [11] Drivers of Klein-backed cars included Jacques Villeneuve, who won the Indianapolis 500 and the CART championship in 1995; and Dan Wheldon (co-major sponsor with Jim Beam) as well as being an associate sponsor for all of Andretti-Green Racing, who won the Indianapolis 500 in 2005.
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.
The Klein–Nishina formula was derived in 1928 by Oskar Klein and Yoshio Nishina, and was one of the first results obtained from the study of quantum electrodynamics. Consideration of relativistic and quantum mechanical effects allowed development of an accurate equation for the scattering of radiation from a target electron.
The initial Bessa cameras (1929–30) took 6×9 cm frames on 120 film and used a waist-level finder; a button was used to release the front, which folded down and allowed the lens to extend. These were succeeded by improved versions that added a folding frame finder (1930–35) and dual-format capability (1932–33, 3.4×5.5 cm; then 1935–37 ...
The centre finder head can be used for: Marking lines through the centre of circular or square objects, such as dowels. Making multiple marks at different angles can be used to identify the point at the centre of the circle. Marking lines perpendicular to a curved edge (normal lines). Bisecting square corners to mark a 45° angle. [2]
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