EXPOSURE METER ARRANGEMENT WITH PHOTO-CONDUCTIVE CELL AND A BATTERY FEEDING THE LATTER, ALSO A GALVANOMETER THE POINTER ZERO POSITION OF WHICH INDICATES THE BALANCING OF THE MEASURING APPARATUS BROUGHT ABOUT BY RESISTANCE ATTENUATION ELEMENTS, AND THUS THE CORRECT COMBINATION OF THE EXPOSURE FACTORS ACCORDING TO BRIGHTNESS, WHEREIN ON THE ONE HAND THE ENTIRE MEASURING APPARATUS INCLUDING GALVANOMETER IS CONNECTIBLE THROUGH A SWITCH TO THE BATTERY AND IN THAT ON THE OTHER HAND WHEN THE BATTERY IS DISCONNECTED FROM THE ENTIRE MEASURING APPARATUS A PERMANENT CURRENT AT THE LEVEL OF THE SELF-DISCHARGE CURRENT OF THE BATTERY IS FED TO THE GALVANOMETER THROUGH AN AUXILIARY CURRENT PATH WHICH IS OF HIGH OHMIC VALUE IN COMPARISON WITH EVERY RESISTANCE VALUE OF THE MEASURING APPARATUS.