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1 Watkins
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2 Watkins, Alfred
SUBJECT AREA: Photography, film and optics[br]b. 1854 Hereford, Englandd. 7 April 1935 Hereford, England[br]English photographer who developed the first practical exposure-measuring system.[br]His first patent was granted on 27 January 1890 and described a method of measuring the "actinic" value of light as a means of determining exposure. A strip of sensitized paper which darkened on exposure to light was used, and the time taken for it to darken to match a standard tint was measured. This time could be used to calculate the necessary exposure time, taking into account the speed of the plate, shutter speed and aperture. Watkins marketed a number of these actinometer designs, of which the most popular was the Watkins Bee Meter, which was in a pocket-watch form, introduced in 1903 and remaining on sale until 1939. Watkins was concerned that photographers recognize that exposure measurement had to take into account the effect of development time and temperature. In 1893 he devised the concept of the "Watkins Factor": he showed that when plates were developed by inspection, as was the practice at the time, a fixed relationship existed between the time of the first appearance of the image and the total time required to give a fully developed negative. The Watkins Factor was the figure that the first time must be multiplied by to give the second time. Watkins published tables of factors for different brands of plates and for different developers, and marketed various aids such as specially calibrated thermometers and clocks, as aids in using "Fac-torial Development" to give consistent negatives. After the early years of the twentieth century Watkins gave up direct participation in photography and devoted his time to a variety of interests, including the plotting of ley lines in England.BC -
3 Watkins College of Art and Design
University: WCADУниверсальный русско-английский словарь > Watkins College of Art and Design
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4 Watkins Electric Music
Trademark term: WEMУниверсальный русско-английский словарь > Watkins Electric Music
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5 Watkins Farnum Performance Scale
Physiology: WFPSУниверсальный русско-английский словарь > Watkins Farnum Performance Scale
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6 Watkins Fitness & Sports Equipment
Trademark term: WFSEУниверсальный русско-английский словарь > Watkins Fitness & Sports Equipment
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7 Watkins Freight Lines
Transport: WTKNУниверсальный русско-английский словарь > Watkins Freight Lines
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8 Watkins Glen High School
School: WGHSУниверсальный русско-английский словарь > Watkins Glen High School
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9 Watkins Glen Weekend
Science fiction WGWУниверсальный русско-английский словарь > Watkins Glen Weekend
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10 Watkins Johnson
Trademark term: WJ -
11 Watkins Mill Elementary School
School: WMESУниверсальный русско-английский словарь > Watkins Mill Elementary School
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12 Watkins Mill High School
School: WMHSУниверсальный русско-английский словарь > Watkins Mill High School
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13 Watkins Technology Group
Business: WTGУниверсальный русско-английский словарь > Watkins Technology Group
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14 Watkins Technology Group, Inc.
Trademark term: WTGIУниверсальный русско-английский словарь > Watkins Technology Group, Inc.
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15 Watkins, Lourie, Roll, & Chance, L. L. P.
Law: WLRCУниверсальный русско-английский словарь > Watkins, Lourie, Roll, & Chance, L. L. P.
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16 AM-1490, Watkins Glen, New York
Radio: WGMFУниверсальный русско-английский словарь > AM-1490, Watkins Glen, New York
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17 Jacob Saul Watkins
Trademark term: JSWУниверсальный русско-английский словарь > Jacob Saul Watkins
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18 Latham & Watkins, LLP
Trademark term: L&WУниверсальный русско-английский словарь > Latham & Watkins, LLP
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19 лазер, работающий на механизме Ридли-Уоткинса-Хилсума
Electronics: Ridley-Watkins-Hilsum-mechanism laserУниверсальный русско-английский словарь > лазер, работающий на механизме Ридли-Уоткинса-Хилсума
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20 модель Ридли-Уаткинса-Хилсума
Electronics: Ridley-Watkins-Hilsum modelУниверсальный русско-английский словарь > модель Ридли-Уаткинса-Хилсума
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См. также в других словарях:
Watkins (surname) — Watkins is an English and Welsh surname derived as a patronymic from Watkin, in turn a diminutive of the name Watt (also Wat), a popular Middle English given name itself derived as a pet form of the name Walter. It may refer to: *Aaron S. Watkins … Wikipedia
Watkins — ist der Familienname von: Inhaltsverzeichnis A B C D E F G H I J K L M N O P Q R S T U V W X Y Z A Aaron S. Watkins (1863–1941), US amerika … Deutsch Wikipedia
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Watkins Glen International — The Glen Caractéristiques générales Lieu 2790 County Route 16 Watkins Glen, NY 14891 … Wikipédia en Français
Watkins Glen State Park — is located on the edge of the village of Watkins Glen, New York, south of Seneca Lake in Schuyler County. The main feature of the park is the hiking trail that climbs up through the gorge, passing over and under waterfalls. The park has a lower… … Wikipedia
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Watkins-Ammer — Systematik Ordnung: Sperlingsvögel (Passeriformes) Unterordnung: Singvögel (Passeri) Familie: Ammern (Emberizidae) Gattung … Deutsch Wikipedia
Watkins — may refer to: Places In the United States: * Watkins, Colorado * Watkins, Iowa * Watkins, Minnesota Organisations * Watkins Incorporated, a manufacturer of cosmetics, health remedies and baking products * Watkins Electric Music, a manufacturer of … Wikipedia
Watkins Glen (New York) — Watkins Glen Watkins Glen est un village situé dans le comté de Schuyler, état de New York. Sa population était de 2 149 habitants selon le recensement de 2000. C est le siège du comté de Schuyler. Elle est plus célèbre en dehors des États… … Wikipédia en Français