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Binocular telescopes, or binoculars, are two
identical telescopes mounted side-by-side and aligned to
point accurately in the same direction, allowing the viewer to use both eyes when viewing distant objects
giving, unlike a monocular telescope, a three-dimensional image: . Most are sized to be held using
both hands, although there are much larger types.
Low Magnification , Medium Magnification , High Magnification , Zoom ,
Compact , Digital Camera Combo , Fog Resistant , Giant, Image Stabilizing ,
Pocket , UV Protection , Waterproof.
.Hand-held binoculars
range from small 3 x 10 Galilean opera glasses, used in theaters, to glasses
with 7 to 12 diameters magnification and 30 to 50 mm objectives for typical
outdoor use. Porro prism models predominate although bird watchers and hunters
tend to prefer, the lighter but more expensive
roof-prism models.
Many tourist attractions have installed pedestal-mounted, coin-operated
binoculars to allow visitors to obtain a closer view of the attraction.
There are binoculars designed specifically for civilian and
military use at sea. Hand held models will be 5× to 7× but with very large prism
sets combined with eyepieces designed to give generous eye relief. Large, high-magnification,
models with large objectives are also used in fixed mountings.
Binoculars are widely used by amateur astronomers; their wide field of view
making them useful for comet and supernova seeking and
general observation .
Manufacturers
AIW , Alpen , Audubon , Barska , Bausch & Lomb, Brunton ,
Bushnell ,Canon, Carson Optical , Celestron , Coleman , Eagle Optics ,
Fuji , Galileo , Galileo Visions, Inc, Kalimar , Konica , Leica,
Mead , Meade , MEADE , Meade Instruments , Minox ,
NEIKO ,
Night Owl , Night Owl Optics , Nikon , NIKON , Nikon Sports And
Recreational Optics ,
Olympus , Orion , Pentax , Periscope , Sharper Image , Sibir Optics ,
Simmons,
Skyline, Steiner , Swarovski, Swift , Tasco , Vanguard ,
Victory Multimedia ,
Vivitar , Vixen , Wild Planet , Yukon, Yukon Optics ,
Zeiss , Zhumell, Inc.
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