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
The Stone Flower (1946 film) Bazhov liked the film, mostly the actors' performances. However he said that there was "little Ural" in it, for example there was a scene where people sing "Kalinka" as if "there are no good Ural songs". The Stone Flower (1946 film) The Stone Flower () is a 1946 Soviet fantasy film directed by Aleksandr Ptushko. It is an adaptation of Pavel Bazhov's story of the same name, in turn based on Ural region Russian folklore. It also incorporates plot elements from the stories "The Mistress of the Copper Mountain" and "The Master Craftsman". "The Stone Flower" was theatrically released by