Musgers cinematograph

Musger's cinematograph with optical compensation for image migration is an early film projector that could also be used as a film camera.

The cameras in Musger's time transported the film in jerks, which means that the film was always torn one frame further; this also made it wear out faster. Musger's serial machine with a mirror wheel let the film move past a lens in a steady motion . The necessary light was generated with an electric arc . The light fell through a lens onto the film tape, the resulting image fell through a lens onto the rotating mirror wheel and was then directed out of the apparatus. If the mirror wheel did not turn, the resulting image would move upwards and upwards. The mirror wheel rotated synchronously with the film tape, and therefore the image always fell on the same spot on the screen . You could also record with the machine; all you had to do was replace the lenses, and you needed a darkroom for the photosensitive film .