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Acmade high speed cine camera, c 1950.
This camera was manufactured in limited numbers by the British firm Acmade and was capable of recording images at several thousand frames per second. It was intended to record fast-moving events, such as explosions, rockets, misiles, aircraft and machinery, and was originally used by airforce bases to analyse movement. This internal view of the camera shows the rotating sprocket wheel around which the film was wrapped. In operation, this revolved continuously at high speed, and a rotating prism behind the lens acted both as a shutter and optical compensator, moving the image down with the film as it sped through the camera.