Nikon 1683 Instruction Manual - Page 22

-CONTROLS IN DETAIL-contlnued----------, Metering range of exposure meter When there is a proper combination of lens aperture and shutter speed, 0 lights up, indicating correct exposure. This sign will not light up when the aperture and shutter speed combination is not suitable for correct exposure. Also, if the combination of aperture and shutter speed is improper for the brightness of the subject, the exposure meter will not give an indication for correct exposure even if you vary the neighboring settings within a very narrow range . You should try altogether different combinations of aperture and shutter speed. If you still fail to obtain an indication for correct exposure, then subject brightness is probably beyond the metering range of the exposure meter. It is necessary to illuminate the subject or to use an NO (neutral density) filter to adjust brightness. Note that in full-aperture measurement, the range of brightness that can be measured by the meter varies with the maximum flnumber of the lens in use, as follows: With a 50mm f/1 .4 lens (1 sec . at f/1.4 and 1/4000 sec . at fiB) and ASAIISO 100 film, the EV range is from EV 1 to EV 1B. With a 135mm f/2 .8lens (1 sec ..at f/2.B and 1/4000 sec . at f/16) and ASAIISO 100 film, the EV range is from EV3 to EV20 22