Cinerama

Cinerama is the trademarked name for a widescreen process which works by simultaneously projecting images from three synchronized 35 mm projectors onto a huge, deeply-curved screen, subtending 146° of arc. It is also the trademarked name for the corporation which was formed to market it. It was the first of a number of such processes introduced during the 1950s, when the movie industry was reacting to competition from television. Cinerama was presented to the public as a theatrical event, with reserved seating and printed programs, and audience members often dressed in best attire for the evening.

The Cinerama projection screen, rather than being a continuous surface like most screens, is made of hundreds of individual vertical strips of standard perforated screen material, each about 7/8 inch (~22 mm) wide, with each strip angled to face the audience, so as to prevent light scattered from one end of the deeply-curved screen from reflecting across the screen and washing out the image on the opposite end. The display is accompanied by a high-quality, seven-track discrete directional surround sound system.

The original system involved shooting with three synchronized cameras sharing a single shutter. This was later abandoned in favor of a system using a single camera and 70mm prints. This latter system lost the 146° field of view of the original three-strip system and the resolution was markedly lower. Three-strip Cinerama did not use anamorphic lenses, although two of the systems used to produce the 70mm prints (Ultra Panavision 70 and Super Technirama 70) did employ anamorphics. Later, 35mm anamorphic reduction prints were produced for exhibition in theatres with anamorphic Cinemascope-compatible projection lenses.