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Leupold & Stevens, Inc. / 45.52380; -122.82243. Leupold & Stevens, Inc. is an American manufacturer of telescopic sights, red dot sights, binoculars, rangefinders, spotting scopes, and eyewear located in Beaverton, Oregon, United States. The company, started in 1907, is on its fifth generation of family ownership. [ 2][ 3]
Lens covers or lens caps protect the objective and/or ocular lens surface against foul weather and accidental damage. There are slide-over, bikini and flip-open type covers, without or with transparent covering material. Optical filters such as Grey, Yellow and Polarising filters to optimize image quality in various lighting conditions.
8×42 roof prism binoculars with rainguard and opened tethered lens caps. Binoculars or field glasses are two refracting telescopes mounted side-by-side and aligned to point in the same direction, allowing the viewer to use both eyes ( binocular vision) when viewing distant objects.
A view through the Mark III Free Gun Reflector Sight, first produced in 1943, used on British army guns, naval guns, and as a pilot sight and a defensive gun sight on aircraft. The reticle image in this sight is produced by an optical collimator bounced off a beam splitter. The dot remains on the target even though the viewer's head is moved ...
12. Leupold. Leupold is based in Beaverton, Oregon, and makes binoculars, scopes and rangefinders used by golfers, hunters, security personnel and police. The company will replace its riflescopes ...
The lens capsule is a transparent membrane that surrounds the entire lens. The capsule is thinnest at the posterior pole with approximate thickness of 3.5μm. Average thickness at the equator is 7μm. [ 7][ 10] Anterior pole thickness increases with age from 11-15μm. The thickest portion is the annular region surrounding the anterior pole.
A Luneburg lens (original German Lüneburg lens) is a spherically symmetric gradient-index lens. A typical Luneburg lens's refractive index n decreases radially from the center to the outer surface. They can be made for use with electromagnetic radiation from visible light to radio waves . For certain index profiles, the lens will form perfect ...
A lens cover or lens cap provides protection from scratches and minor collisions for camera and camcorder lenses. Lens covers come standard with most cameras and lenses. Some mobile camera phones include lens covers, such as the Sony Ericsson W800, the Sony Ericsson K750 and the Sony Ericsson K550 . A more secure lens cap is the metal screw-in ...
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