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The Bausch and Lomb patent also compares the distortion of their design favorably to a similar 5 element lens, patented in 1938, which has a slightly wider maximum f-number of f /5.6. [8] It is not certain whether Bausch and Lomb incorporated their own design instead of the Zeiss design when producing Metrogon lenses after 1943.
In 2006, the original lens for the Bausch & Lomb telescope cracked beyond repair due to constant heating and cooling from use in the heliostat. The 18-inch and 16-inch teaching telescopes on the Observing Deck were replaced by two 20-inch Planewave CDK telescopes in 2017, named Artemis and Apollo. [citation needed]
Bausch & Lomb (since 2010 stylized as Bausch + Lomb [2]) is an American-Canadian eye health products company based in Vaughan, Ontario, Canada. It is one of the world's largest suppliers of contact lenses , [ 3 ] lens care products, pharmaceuticals, intraocular lenses , and other eye surgery products.
In November and December 1941, the United States National Defense Research Committee conducted extensive tests between the American Bausch and Lomb M1 stereoscopic rangefinder and the British Barr and Stroud FQ 25 and UB 7 coincidence rangefinders, and concluded "that the tests indicate no important difference in the precision obtainable from ...
His first firm, the Gundlach Optical Company was established in Rochester, New York. In 1895 he left the company and founded a new one called Gundlach Photo-Optical Company (later renamed Ernst Gundlach, Son, and Company) which produced photographic lenses. In 1898 the Gundlachs left the company and it became the Rochester Lens Company.
CinemaScope (USA ["Bausch & Lomb formula" anamorphics, used for the fourth and all subsequent CinemaScope films]/France ["Chrétien formula" anamorphic, used for only the first three CinemaScope films]; pre-releases were 2.66:1, with separate 3-track sound, and 2.55:1, with composite 4-track sound, before standardization on 2.35:1; all general ...
Topogon-design lens and auxiliary viewfinder for the Mamiya Press line of cameras. Goerz was merged into the Zeiss Ikon company in 1926. [9] An independent branch of Goerz in America, which had been established in 1895, licensed the Topogon design to Bausch & Lomb, who produced it as the Metrogon for the United States, citing the same US patent as the Topogon.
In November and December 1941, the United States National Defense Research Committee conducted extensive tests between the American Bausch and Lomb M1 stereoscopic rangefinder and the British Barr and Stroud FQ 25 and UB 7 coincidence rangefinders, and concluded "that the tests indicate no important difference in the precision obtainable from the two types of instrument – coincidence and ...
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