JPS513629

1474155 SLR cameras PENTACON DRESDEN KAMERA UND KINOWERKE VEB 22 May 1975 [17 June 1974 5 July 1974] 22313/75 Heading G2A An SLR camera has an objective 1 with a preselectable diaphragm 2, partly transparent mirrors 3, 4 for directing light to a view-finder 16 and to a shutter-controlling photo-cell 6 and a light regulator 7 e.g. a diaphragm or filler located in front of the photo-cell 6 and coupled to the pre-selectable diaphragm 2 so that before exposure regulator 7 admits an amount of light to photocell 6 dependant on the pre-selected stop of diaphragm 2 and upon exposure as diaphragm 2 stops down, regulator 7 opens up whereby throughout the operation photo-cell 6 receives a constant light intensity. As shown, photo-cell 6 is coupled to an integrating capacitor 10 which controls closure of a shutter 9,13. Figs. 2, 3 and 4 (not shown), show preferred methods of coupling the diaphragm to the regulator.