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
Diana Vreeland: The Eye Has to Travel stylish doc should enjoy a nice arthouse run before becoming an essential presence on the DVD shelves of fashionistas everywhere.” Writing for "Variety", Jay Weissberg says, “Few names conjure ‘style’ with the zest of Diana Vreeland, and documentary "The Eye Has to Travel" gets the zing just right.” Currently, the film has a rating of 95% on Rotten Tomatoes, based on 63 reviews and an average score of 7.2/10. Diana Vreeland: The Eye Has to Travel Diana Vreeland: The Eye Has to Travel is a 2011 documentary about the life and career of Diana Vreeland, a fashion legacy famous for