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RetailMeNot.com, a digital coupon site in the United States [3] eConversions, the parent company of Gutschein-Codes.de in Germany and VoucherCodes, a voucher code site in the United Kingdom [19] [20] Ma-Reduc.com and Poulpeo.com, digital coupon and cash back sites in France [21] ZenDeals.com, a North American coupon site (October 9, 2013) [22]
Video demonstration of high-speed flash photography. A flash is a device used in photography that produces a brief burst of light (lasting around 1 ⁄ 200 of a second) at a color temperature of about 5500 K [1] [citation needed] to help illuminate a scene. The main purpose of a flash is to illuminate a dark scene.
By 1941, two years after GE introduced the guide number system, guide number ratings for products like the GE No. 11 were being discussed in books like Flash in Modern Photography. [13] By 1944, the 16th edition of Wall's Dictionary of Photography featured a guide number table. [14]
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In 1930, Schwartz invented a flash synchronizer for work with flashbulbs, [3] [4] then novel replacements for flash powder. [5] Schwartz invented the "Kalart Flash Synchronizer" in 1930, founding the Kalart company to market this and other products. His father Kalman ran the Kalart Photography Studio in Manhattan; his brother Hy was also a ...
Flash's photography is featured in the 2009 book Posing Beauty: African American Images from the 1890s to the Present. [21] Flash's 2018 solo show, Lola Flash: 1986 – Present, is a 30-year retrospective, spanning three decades of influential works curated for exhibition at Pen + Brush in New York City. [22]
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An air-gap flash is a photographic light source capable of producing sub-microsecond light flashes, allowing for (ultra) high-speed photography. This is achieved by a high-voltage (20 kV typically) electric discharge between two electrodes over the surface of a quartz (or glass) tube.