To determine the exposure time needed for a given film the light meter was usually used.įilm speed measurement systems Historical systems Warnerke Ultimately sensitivity is limited by the quantum efficiency of the film or sensor. In short, the higher the sensitivity, the grainier the image will be. In both film and digital photography, the use of higher sensitivities generally leads to reduced image quality (via coarser film grain or higher image noise of other types). Exposure times for early photgraphic emulsions went from hours to minutes and then seconds and fractions of a second in the 1800's. Emulsions that were less sensitive were called slower because the time to complete an exposure was much longer and often usable only for still lifes. Photographic emulsions that were more sensitive to light needed less time to generate an acceptable image and thus a complete exposure could be finished faster, with the subjects having to hold their pose and not make any body movements for a shorter length of time. The term speed comes from the early days of photography. Prior to ISO gaining traction the best known systems were ASA in the U.S. A closely related ISO system is used to describe the relationship between exposure and output image lightness in digital cameras. (As is common, the "100" in the film name alludes to its ISO rating.)įilm speed is the measure of a photographic film's sensitivity to light, determined by sensitometry and measured on various numerical scales, the most recent being the ISO system introduced in the mid-1970s. The second is often dropped, making (e.g.) "ISO 100" effectively equivalent to the older ASA speed. This film container denotes its speed as ISO 100/21°, including both arithmetic (100 ASA) and logarithmic (21 DIN) components. Send us feedback about these examples."Slow film" redirects here. These examples are programmatically compiled from various online sources to illustrate current usage of the word 'luminary.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. 2023 The Dallas native and former Texas A&M women’s coach was enshrined in basketball history on Saturday night, inducted with the likes of Dirk Nowitzki, Gregg Popovich and other basketball luminaries. Nardine Saad, Los Angeles Times, 14 Aug. presidents, luminaries and contemporaries paid their respects. 2023 Avant died Sunday at age 92, and as word of his death spread, past U.S. Pamela McClintock, The Hollywood Reporter, 14 Aug. David Adjaye, Curbed, 6 July 2023 Upcoming original specialty programming includes two films featuring renowned American soprano Renée Fleming touring and singing in Paris and Venice with music luminaries. Liam Hess, Vogue, 17 July 2023 Many of the industry’s luminaries have explained to me all the ways that unions are incompatible with their practices. 2023 Naturally, the guest list was filled with fashion luminaries-most importantly Jefferson’s ex-partner, Kate Moss, and their daughter, the rising model Lila. 2023 The designer, who wove a colorful signature look in her textiles and collaborated with mid-century luminaries like Frank Lloyd Wright and Henry Dreyfuss, is the focus of an exhibition at the Cooper Hewitt, Smithsonian Design Museum. Jay Caspian Kang, The New Yorker, 24 Aug. 2023 Ludlow’s grand experiment was featured in newspapers and magazines, and luminaries such as Lena Horne, Ella Fitzgerald, and Martin Luther King, Jr., made appearances. Recent Examples on the Web Such insider anecdotes pepper this engaging memoir, offering insight into his coverage of such luminaries as Muhammad Ali, Michael Jordan and Tiger Woods.
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