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CinemaScope

Early widescreen filming system

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When 20th Century Fox began using CinemaScope, this marked the beginning of the modern anamorphic format in 2.55:1, almost twice as wide as the previously common Academy format's 1.37:1 ratio. Although the technology behind the CinemaScope lens system was made obsolete by later developments, primarily advanced by Panavision, CinemaScope's anamorphic format has continued to this day. In film-industry jargon, the shortened form, 'Scope, is still widely used by both filmmakers and projectionists, although today it generally refers to any 2.35:1, 2.39:1, 2.40:1, or 2.55:1 presentation or, sometimes, the use of anamorphic lensing or projection in general. Bausch & Lomb won a 1954 Oscar for its development of the CinemaScope lens.

Origins

CinemaScope derives from a film process called Anamorphoscope developed by French inventor Henri Chrétien and patented in 1926. It used lenses that employed an optical technique called Hypergonar to produce an image twice as wide as those that were created with conventional lenses by compressing the image laterally during shooting and dilating it during projection. Chrétien attempted to interest the motion picture industry in his invention but, at that time, the industry was not sufficiently impressed.

By 1950, however, competition from television was causing a serious decline in cinema attendance. To combat this, Cinerama and 3D films were both launched in 1952. This persuaded Spyros Skouras, the head of 20th Century Fox, that technical innovation could buoy filmmaking against the television challenge. Skouras tasked Earl Sponable, head of Fox's research department, with devising a rival projection system that, unlike Cinerama, could be retrofitted to existing theatres at a relatively modest cost. Herbert Bragg, Sponable's assistant, remembered Chrétien's hypergonar lens.

The optical company Bausch & Lomb was asked to produce a prototype "anamorphoser" (later shortened to anamorphic) lens. Meanwhile, Sponable tracked down Professor Chrétien, whose patent for the process had expired, so Fox purchased his existing Hypergonars, and the lenses were flown to Fox's studios in Hollywood. Test footage shot with the lenses was screened for Skouras, who gave the go-ahead for development of a widescreen process that would become known as CinemaScope.

20th Century-Fox's pre-production of The Robe, originally committed to Technicolor three-strip origination, was halted so that the film could be changed to a CinemaScope production (using Eastmancolor, but processed by Technicolor). The use of the CinemaScope technology became a key feature of the film's marketing campaign. Two other CinemaScope productions were also planned: How to Marry a Millionaire and Beneath the Twelve-Mile Reef. So that production of the first CinemaScope films could proceed without delay, shooting started using the best three of Chrétien's Hypergonars, while Bausch & Lomb continued working on their own versions. The introduction of CinemaScope enabled Fox and other studios to respond to the challenge from television by providing a key point of difference.

Chrétien's Hypergonars proved to have significant optical and operational defects, primarily loss-of-squeeze at close camera-to-subject distances, plus the requirement of two camera assistants (the first for prime lens focusing, the second for anamorphic lens focusing)

Bausch & Lomb, Fox's prime contractor for the production of the lenses, initially produced an improved Chrétien-formula adapter lens design (CinemaScope Adapter Type I), and subsequently produced a dramatically improved and patented Bausch & Lomb-formula adapter lens design (CinemaScope Adapter Type II).

Ultimately, Bausch & Lomb formula combined lens designs incorporated both the prime lens and the anamorphic lens in one unit (initially in 35, 40, 50, 75, 100 and 152 mm focal lengths, later including a 25 mm focal length). The combined lenses continue to be used to this day, particularly in special effects units. Other manufacturers' lenses are often preferred for so-called production applications that benefit from significantly lighter weight or lower distortion, or a combination of both characteristics.

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