Diaphragm (optics) photographic lens is called an iris diaphragm. In the early years of photography, a lens could be fitted with one of a set of interchangeable diaphragms , often as brass strips known as Waterhouse stops or Waterhouse diaphragms. The iris diaphragm in most modern still and video cameras is adjusted by movable blades, simulating the iris of the eye. The diaphragm has two to twenty blades (with most lenses today featuring between five and ten blades), depending on price and quality of the device in which it is used. Straight blades result in polygon shape of the diaphragm opening, while
Eye of the Beholder (film) Eye of the Beholder (film) Eye of the Beholder is a 1999 Canadian-British-Australian mystery thriller film that employs magical realism. The film, based on Marc Behm's novel of the same name and a remake of Claude Miller's 1983 French thriller "Deadly Circuit", is directed and adapted by Stephan Elliott. Starring Ewan McGregor and Ashley Judd, the film is an international co-production of Canada, the United Kingdom, and Australia. Stephen Wilson aka "The Eye" (Ewan McGregor) is an intelligence agent whose current assignment is to track down the socialite son of his wealthy boss and find out what trouble he has