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Vortex Optics is a DBA of Sheltered Wings, Inc., which was incorporated in Wisconsin in 1989. Sheltered Wings, Inc. DBA Vortex Optics began in 2002. In 2022 after extensive research, testing and reviews Vortex became an official supplier and contractor to the American Military as the U.S. Army selected Vortex‘s XM-157 fire control system for its Next Generation Squad Weapon program.
An optical vortex (also known as a photonic quantum vortex, screw dislocation or phase singularity) is a zero of an optical field; a point of zero intensity. The term is also used to describe a beam of light that has such a zero in it. The study of these phenomena is known as singular optics.
The first ACOG model, known as the TA01, was released in 1987. [3] [4] An example was tested on the Stoner 93 in the early 1990s by the Royal Thai Armed Forces. [5]In 1995, United States Special Operations Command selected the 4×32 TA01 as the official scope for the M4 carbine and purchased 12,000 units from Trijicon. [6]
Various methods of open sight contrast enhancement. Left to right: Three dot, white outline, straight-eight, red insert, dot and bar, gold bead Steyr triangular pistol sights Tritium-illuminated handgun night sights on a FN Five-seven Green fiber optic contrast enhancement rods used in an adjustable open sight rear element
The G-41(m) and G-41(w) semi-automatic rifles had ZF40 scopes added in small quantities for test and evaluation in the field. MP-43, MP-44, FG-42 automatic select fire weapons had the ZF41/1 fitted for test only, these were not produced past prototype stage, the ZF4 scope was then used on these weapons instead.
Spotting scope eyepieces are usually interchangeable to adapt for different magnifications, or may have variable zoom to give a range of magnifications. Magnifications less than 20× are unusual, as are magnifications more than 60× since the latter can lead to poorer image brightness, a narrow field of view and too much image shaking, even on ...
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