Centering The Needle - Nikon PhotomicF Tn Finder Instruction Manual

Centering the Needle

The correct exposure is found by centering the meter needle, either im the V-shaped notch which is visible in the
viewhinder or at the central mark located beneath the window on top of the finder. Tum either the shutter speed
selector or lens aperture ring until the needle is centered. For fine adjustments of less than one f/stop, use the lens
aperture ring, since it provides reliable imtemmediate settings between the marked f/numbers. The shutter speed
selector is not set for intermediate values.
As an added convenience, the shutter speed in use appears in the viewfinder, so the shutter speed can be adjusted
while observing the exposure meter needle. In dim light, the accessory Photomic Illuminator DL-1 illuminates the
meter needle and shutter speed for easy reading. Under extremely low light conditions, the meter needle may center
at the "B" setting on the shutter speed selector. If so, the correct exposure time is two seconds. If the needle centers
at "T," exposure time is four seconds.
If the needle cannot be centered or stiU moves erraticaUy after all possible aperture-shutter speed combinations have
been tried, then the light is too bright or too dim for the meter. The meter's effective range (coupling range) varies
according to lens used and film speed. For example, with the 50mm f/1.4 lens and film rated at ASA 100, it extends
from f/1.4 at 1/2 second to f/11 at 1/1000 second.
Note: If the meter is exposed to bright light at below-freezing temperature, it may malfunction or cease to
operate until the temperature rises again. Therefore, be careful not to leave the meter turned on for more than
three minutes at a time in cold weather.
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