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
Snow Flower and the Secret Fan (film) the Bund. Rupert Murdoch personally arranged for the film to be released by Fox Searchlight Pictures, which opened the film in North America on July 15, 2011.<ref name="http://www.movingpicturesnetwork.com/27627/summer-preview-2011-snow-flower-secret-fan/"></ref> The film received generally negative reviews from critics. On Rotten Tomatoes, it has a 21% approval rating, based on 87 reviews. On Metacritic, it has a score of 42 out of a possible 100, based on 31 reviews. Snow Flower and the Secret Fan (film) Snow Flower and the Secret Fan is a 2011 historical drama film based on the novel of the same name written by Lisa See. Directed by Wayne