Abstract: A film exposing equipment such as motion picture cameras and still cameras is equipped with photometric devices measuring the quantity of light falling upon the film to be exposed. The display device showing the user the measurement result comprises a succession of light emitting diodes adjacent to each other, determining the measuring scale, these diodes being powered and hence lit up at all times with the exception of the single diode among them, which, unlit, constitutes the mark giving the measurement result. The succession of light emitting diodes comprises at predetermined intervals, specific diodes different from the other diodes by their dimensions and/or colors, constituting specific marks on the measurement scale.

Abstract: A moving picture camera with interchangeable film magazine comprises in each magazine, a take-up roll on which is wound the exposed film, and an electric motor rotating this roll.A measuring device is provided for measuring the speed of rotation of the take-up roll and for delivering a first signal representing this speed of rotation. A computer circuit receiving at its inputs said signal and a signal representing the image cadence selected and another signal representing the desired tension for the film, delivers at its ouptut a signal representing the value of the intensity of the electric current supplied to the motor, so that the required mechanical power, in other words the useful electric power supplied by this motor, is constant, for a selected image cadence and a desired film tension.

Abstract: This device displays figures by a combination of five character segments.A first character segment is located in the lower left-hand quadrant of a matrix and has the form of a deformed C. A second character segment is located in the upper left-hand quadrant of the matrix, the outline of which starts substantially from the center of the matrix, follows the left-hand half of the horizontal median line then at least the upper half of the left-hand vertical side. A third character segment is located in the upper right-hand quadrant and has substantially the form of an inversed C. A fourth character segment comprises a first horizontal section extending over a part of the lower side of the matrix, at the center thereof, and a second rectilinear section starting from the center of the first section and extending vertically or substantially vertically to a point in the right-hand half of the upper side. A fifth character segment is located in the bottom right quadrant and has substantially the form of an inversed C.