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The Spoor-Berggren camera resembles the ordinary motion picture camera in external appearance, except that the magazine cases that carry the film are larger to accomodate the wide film. As many as 1,000 feet of film can be carried in these magazines, the maximum footage which is employed in current standard-size film practice. Thus, with the addition of sound, lenghthy sequences of singing, talking and sound, action may be filmed without a break for reloading the cameras. In the position where the single lens of the standard camera is normally located, are two lenses, side by side, resembling two « eyes ». The images they see are combined and transferred to the film through a duplex lens system* A special mechanical system in the camera prevents the wide film, used forn these pictures, from bulging and flapping as it travels through the mechanism. Operation of the Spoor camera is not radically different from that of the standard camera.
In « shooting » pictures with the Spoor camera, the usual lighting of a motion picture set is employed. The lens system of the camera functions under precisely the same conditions that prevail in standard camera operation today, but will produce a much clearer and better defined picture at the same time.
This latter is one of the outstanding features of the new camera. It will focus sharply on foreground and background simultaneously, giving none of the blurred effects noted in ordinary motion picture close-ups. In the scenic film of Niagara, objects two miles away retained a sharpness of detail rivaling the Falls in the foreground in which particles of water could be clearly discerned.
The Spoor-Berggren projection machine closely resembles the standard motion picture projector in current use, except that its mechanical systems are arranged to carry the double width film. This requires special gearing and a compressed air control on which the wide film rides to prevent buckling or twisting. The lens system is standard optically, but larger to project the oversize picture. A special shutter arrangement is employed which differes radically from standard types.
At yesterday's demonstration, the picture was thrown on the screen from a distance of 144 feet. The lenght of the « throw » makes no difference, and may be increased or decreased to fit all theatres. The only requirement in projection, aside from the projector, is a large screen, usually covering the proscenium opening of the theatre.
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