Diaphragm (optics) 1889 "Dictionary of Photography" (see figure), but disappeared after Ernst Abbe's theory of stops unified these concepts. According to Rudolf Kingslake, the inventor of the iris diaphragm is unknown. Others credit Joseph Nicéphore Niépce for this device, around 1820. Mr. J. H. Brown, a member of the Royal Microscopical Society, appears to have invented a popular improved iris diaphragm by 1867. Kingslake has more definite histories for some other diaphragm types, such as M. Noton's adjustable "cat eye" diaphragm of two sliding squares in 1856, and the Waterhouse stops of John Waterhouse in 1858. Diaphragm (optics) In optics, a diaphragm
Same Name the experience and how they did not. In an episode of CBS' "Big Brother 13" (which aired just prior to the show's premiere), the show was promoted during a luxury competition using both the celebrity David Hasselhoff, and the regular-guy David Hasselhoff. The celebrity Hasselhoff later entered the Big Brother house for a cameo appearance. Same Name Same Name is an American reality television series in which an average person swaps lives with a celebrity of the same first name and surname. It premiered on July 24, 2011 on CBS. After four episodes, CBS pulled the low-rated series from its