Diaphragm (optics) the lens. The centre of the diaphragm's aperture coincides with the optical axis of the lens system. Most modern cameras use a type of adjustable diaphragm known as an iris diaphragm, and often referred to simply as an iris. See the articles on aperture and f-number for the photographic effect and system of quantification of varying the opening in the diaphragm. A natural optical system that has a diaphragm and an aperture is the human eye. The iris is the diaphragm, and the opening in the iris of the eye (the pupil) is the aperture. An analogous dev in a
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