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The lenses were made to a joint standard shared by the U.S. Army Air Corps and the U.S. Navy. As a result, the lens carried an "AN" (Army/Navy) specification number: the AN6531. The U.S. Government specified the shape of the lens and the color, which was initially a green tinted lens that transmitted 50% of incoming visible daylight.
Tower 41 (Mamiya Automatic 35 EEF) Mamiya Mammy (1953) — zone focus system Mamiya Speed Shot Special (a.k.a. Mamiya Pistol Camera) (c. 1954) — half-frame; rare police model; not sold to public
The distance is only 0.5 mm larger than the Nikon F-mount, which is not sufficient to make a workable adapter, however, at least one Nikon camera has been modified with a Leica R bayonet mount to take R lenses, [citation needed] and at least two manufacturers make replacement mounts, allowing many Leica R lenses to be used directly on various ...
A Fresnel lens (/ ˈ f r eɪ n ɛ l,-n əl / FRAY-nel, -nəl; / ˈ f r ɛ n ɛ l,-əl / FREN-el, -əl; or / f r eɪ ˈ n ɛ l / fray-NEL [1]) is a type of composite compact lens which reduces the amount of material required compared to a conventional lens by dividing the lens into a set of concentric annular sections.
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The Chiefs will have 28 players become free agents after Super Bowl 59. Here's what to know about their roster for the Big Game and the future.
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