The French physicist Henri Chrétien invents an anamorphic lens: the Hypergonar lens.
The electric arc with an elliptical mirror begins to be used as a light source for film projectors.
Screening of the first sound film, The Jazz Singer, by Alan Crosland, using the Vitaphone sound process. The end of silent film.
Release of the first feature-length colour film to include a soundtrack, The Viking, by Roy William Neill.
Steamboat Willie, by Walt Disney, the first cartoon to use synchronized sound. The character of Mickey Mouse appears for the first time.
The spread of sound films around the world leads to the dubbing and subtitling of films.
Cellulose diacetate film.
Leica camera. The first 35mm camera.
Rolleiflex camera, which works with medium-format roll-film.
Pathé markets 9.5mm film with central perforation, with the slogan "Le Cinéma chez soi", for Pathé Baby devices made for the home movie market. A small, cheap and easy to use device, it represents, along with the 16mm Kodak machines, the beginning of the golden age of amateur filmmaking.
Kodak brings out the 16mm format for the Cine-Kodak camera and the Kodascope projector. That same year Victor also launches its 16mm model.
Bell & Howell brings out its Filmo model, the first 16mm camera with a mechanical string system to wind on the film.
Kodak markets 16mm colour film: Kodacolor.
The Agfa Movex appears, the first 16mm camera made by Agfa. It is the first camera to use a cassette to make loading the film in the camera as easy as possible.
Vladimir Zworykin, a follower of Rosing, patents the iconoscope, a tube-shaped device capable of capturing images and turning them into electronic signals.
John Logie Baird offers the first public demonstration of a mechanical television system based on the Nipkow disc capable of transmitting remote images.
Philo Farnsworth performs the first public demonstration of an electronic television system with image dissector tube, very similar to Zworykin's iconoscope.
BBC makes its first experimental broadcast with a television system of 30 lines and 12.5 images per second.
The first regular radio entertainment broadcasts begin in Buenos Aires.
The first sound systems for films using optical sound appear, the Phonofilm by Lee De Forest and the Tri-Ergon, by the Germans Josef Engi, Hans Vogt and Joseph Massole.
Lee De Forest's Phonofilm makes the first screening of shorts with optical sound incorporated in the film (the future standard system).
The Vitaphone system is created for adding the sound to films. The first sound films with this system, Don Juan and The Jazz Singer, herald the era of sound films.
Austrian engineer Fritz Pfleumer uses cigarette paper covered with iron oxide powder to record sound, the forerunner of magnetophonic tapes.
Harry Nyquist publishes his theorem on the sampling of an analogue signal that lays the theoretical foundations for the digitization of sound.