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
Diana Vreeland: The Eye Has to Travel 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 her time at "Harper’s Bazaar" and "Vogue". The film was directed and produced by Lisa Immordino Vreeland (Diana’s granddaughter-in-law), Bent-Jorgen Perlmutt, and Frédéric Tcheng. It premiered at the 2011 Venice International Film Festival and the Telluride Film Festival. It has a total running time of 86 minutes, and can be seen with English, French, and Italian subtitles. The film features recorded audio and filmed interviews of Vreeland, as well