Three colour projector by Lee and Turner, England, 1901.
In 1899 Edward R Turner (d. 1903), financed by F Marshall Lee, made the first attempt to invent a process of colour cinematography. Turner devised a camera that filmed consecutive frames through red, green and blue filters on 38mm film. The projector had a triple gate and lens that superimposed three frames simultaneously on the screen. As the film passed through the projector, a rotating filter wheel behind the lens ensured each frame was shown with its appropriate colour. The process, however, proved impractical.