In the view-finder of a camera having a TTL type light meter connected to an integrating-type analog-to-digital converter through a repeatedly operated electronic switch, there are positioned fifteen light emitting diodes upon selection of an exposure value by the converter, to illuminate a corresponding indicium on a scale of 15 exposure values, such as shutter times. Since a photo-cell exposed to scene light is also positioned in the view-finder, when the brightness of a scene to be photographed is lowered to such an extent that the influence of light from the energized diode on the photo-cell is not negligible, then the decoder for the diode arrangement is controlled to defer initiation of actuation of the one of the diodes which presents the display of an exposure value derived in the preceding cycle of light metering operation pending transition from the light integrating to the analog-to-digital converting step in the following cycle. With the scene brightness above the critical level, a corresponding diode is allowed to light up at the start of each cycle of light metering operation, so that the intensity of illumination on the exposure indicium is increased to make the reading of that indicium easier.