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The pupil magnification of an optical system is the ratio of the diameter of the exit pupil to the diameter of the entrance pupil. The pupil magnification is used in calculations of exposure. For all symmetric lenses, and for many conventional photographic lenses, the pupils appear the same size and so the pupil magnification is approximately 1. [edit] See also[edit] External linksPágina espejo de la WikipediaDirectorio de Enlaces Directorio dmoz Directorio espejo dmoz Pedro Bernardo |