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1 Dallmeyer, John Henry
SUBJECT AREA: Photography, film and optics[br]b. 6 September 1830 Loxten, Westphalia, Germanyd. 30 December 1883 at sea off New Zealand[br]German/English manufacturing optician and, lens designer.[br]Son-in-law of the great optician Andrew Ross, for whom he worked, Dallmeyer founded his own business in 1860, in which year he introduced his triple achromat lens, which combined the features of a flat field, high definition, a wide angle of view and straight marginal lines, eliminating both the barrel distortion given by the single achromat and the pincushion distortion of the orthochromatic lens. In 1866 he patented the Rectilinear lens, a double achromat pattern which remained in use for over half a century. His portrait lenses, based on the Petzval pattern, were widely used throughout the nineteenth century in studios around the world. Ill health forced Dallmeyer's retirement from business in 1882.BC -
2 Photography, film and optics
See also: INDEX BY SUBJECT AREA[br]Ding HuanGabor, DennisKlic, KarolLippershey, HansMarton, LadislausTournachon, Gaspard FélixBiographical history of technology > Photography, film and optics
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3 Ross, Andrew
SUBJECT AREA: Photography, film and optics[br]b. 1798 London, England d. 1859[br]English optical-instrument maker, founder of a photographic-lens making dynasty.[br]Apprenticed to the optical-instrument maker Gilbert at the age of 14, Ross rose to become Manager of the factory before leaving to found his own business in 1830. He soon earned a reputation for fine craftsmanship and was the first optician in England to produce achromatic microscope objectives. He had an early involvement with photography, perhaps before the public announcements in 1839, for he supplied lenses and instruments to Talbot. On hearing of Petzval's portrait lens, he made a highaperture portrait lens to his own design for the first professional calotypist, Henry Collan. It was unsuccessful, however, and Ross did little more photographic work of note, although his son Thomas and his son-in-law and one-time apprentice, John Henry Dallmeyer, made significant contributions to English photographic optics. Both Thomas and Dallmeyer were left large sums of money on Andrew's death, and independently they established successful businesses; they were to become the two most important suppliers of photographic lenses in England.[br]Further ReadingRudolf Kingslake, 1989, A History of the Photographic Lens, Boston (a brief biography of Ross).J.M.Eder, 1945, History of Photography, trans. E.Epstean, New York.H.J.P.Arnold, 1977, William Henry Fox Talbot, London.JW
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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
John Henry Dallmeyer — 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. Source (en) Rudolf Kingslake, A history of the photographic lens, Academic… … Wikipédia en Français
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
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
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
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
Ned Chaillet — Edward William Ned Chaillet, III ( /ˈʃaɪ … Wikipedia
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
