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) 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 Wang, the film stars Gianna Jun, Li Bingbing, Archie Kao, Vivian Wu, and Hugh Jackman. In nineteenth century China, two girls named Snow Flower (Gianna Jun) and Lily (Li Bing Bing) are forever bonded together as sworn sisters. They are paired as "laotong" by a matchmaker who is also responsible for arranging their marriages. They are isolated by their families and communicate by writing in a