John Henry Dallmeyer, né le 6 septembre 1830 à Loxen (Westphalie) et mort le 30 décembre 1883 est un opticien anglo-allemand, inventeur notamment de l'objectif aplanat.
(en) Rudolf Kingslake, A history of the photographic lens, Academic Press, 1989 (ISBN 0124086403)
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John Henry Dallmeyer — Infobox Person name = PAGENAME image size = 150px caption = PAGENAME birth name = September 6, 1830 birth date = Loxten, Westphalia birth place = December 30, 1883 death date = death place = death cause = resting place = resting place coordinates … Wikipedia
Dallmeyer, John Henry — ▪ British manufacturer born Sept. 6, 1830, Loxten, Westphalia [Germany] died Dec. 30, 1883, at sea off New Zealand British inventor and manufacturer of lenses. Showing an aptitude for science, Dallmeyer was apprenticed to an Osnabrück … Universalium
Thomas Rudolphus Dallmeyer — (1859 1906), English optician was the son of John Henry Dallmeyer who ran an optics business.He assumed control of the business on the failure of his father s health, was principally known as the first to introduce the telephoto lens into… … Wikipedia
F-number — In optics, the f number (sometimes called focal ratio, f ratio, or relative aperture [Smith, Warren Modern Lens Design 2005 McGraw Hill] ) of an optical system expresses the diameter of the entrance pupil in terms of the focal length of the lens; … Wikipedia
Circle of confusion — For the closely related topic in microscopy, see Point spread function. In optics, a circle of confusion is an optical spot caused by a cone of light rays from a lens not coming to a perfect focus when imaging a point source. It is also known as… … Wikipedia
Объектив Петцваля — Оптическая схема объектива Петцваля. Объектив Петцваля тип фотографического объектива. Оптическая схема 4 линзы в трёх группах. Передний компонент … Википедия
Telephoto lens — Portal|Photography|Large format camera lens.jpg created by a telephoto lens is the same as that created by an ordinary lens of the same specified focal length. Construction If a camera lens were to be constructed from a single lens of 200 mm… … Wikipedia
Rapid Rectilinear — Infobox lens design scheme = Rapid rectilinear.svg elements = 4 groups = 2 author = John Henry Dallmeyer year = 1866 aperture = f/|6 (original) f/|3.5 (portrait Aplanat)The Rapid Rectilinear also named Aplanat is a famous photographic lens design … Wikipedia
Hugo Adolph Steinheil — Linsenschema eines Aplanaten Original Steinheil Apl … Deutsch Wikipedia
Апланат — «Апланат» («Рапид Ректилинеар») Оптическая схема. Апланат (от греч … Википедия
