The Gulf Between (lost early color silent film; 1917)
The Gulf Between was the very first motion picture to be shot in Technicolor. The system used to produce this film is called Process 1, which uses an additive two-color system, in which a prism beam-splitter behind the camera lens exposed two consecutive frames of a single strip of black-and-white negative film simultaneously, one behind a red filter, the other behind a green filter. Because two frames were being exposed at the same time, the film had to be photographed and projected at twice the normal speed. Exhibition required a special projector with two apertures (one with a red filter and the other with a green filter), two lenses, and an adjustable prism that aligned the two images on the screen. Eventually, because of the difficult process of projecting, and after a wide screening, a decision was made to use a different system (Process 2).
To this day, only some very short fragments of the film exist at the George Eastman House. Even then, the fragments are not accessible online.
- Cinematographic Multiplex Projection, &c. U.S. Patent No. 1,391,029, filed Feb. 20, 1917.
- "The first Technicolor film was a total disaster a century ago" CNET. 2017-09-09. Retrieved 2018-06-27.
- Evidence of fragments of the film existing. Retrieved 21 Feb '19