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The Large Binocular Telescope (LBT) is an optical telescope for astronomy located on 10,700-foot (3,300 m) Mount Graham, in the Pinaleno Mountains of southeastern Arizona, United States. It is a part of the Mount Graham International Observatory .
Many products were discontinued in favor of competing models produced by Carl Zeiss, while the equipment required to produce high-quality zoom lenses could not be procured. In 1990, Feinoptische Werk Görlitz was spun off from VEB Carl Zeiss and converted into a private limited company and started to produce lenses with the Meyer-Optik logo.
The desirable amount of magnification depends upon the intended application, and in most binoculars is a permanent, non-adjustable feature of the device (zoom binoculars are the exception). Hand-held binoculars typically have magnifications ranging from 7× to 10×, so they will be less susceptible to the effects of shaking hands. [ 25 ]
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A tower viewer [citation needed] is a telescope or pair of binoculars permanently mounted on a stalk. The device magnifies objects seen through its lenses, allowing users to see farther and more clearly than they could with the naked eye or with less powerful viewing devices.
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