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EXPOSURE MEASUREMENT
The exposure meter of the F2AS Photomic finder utilizes
Nikon's through-the-lens center-weighted exposure measure-
ment at full aperture. The meter reads the light over the en-
tire focusing screen but favors the central 1 2mm-diameter
area, while taking the entire area into consideration. This al-
lows you to make precise readings of the selected subject
area, and results in more balanced overall exposures.
+ o -
Underexposure by more than 1 stop
+ o -
Underexposure by 1/5 to 1 stop
+ o -
Correct exposure
+ o -
Overexposure by 1/5 to 1 stop
+ o -
Overexposure by more than 1 stop
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Determining Exposure
The finder has three LED exposure indicators visible within
the viewfield ("+" for overexposure, " " for correct exposure,
and "—" for underexposure); thus, the metering system is
capable of providing easy-to-read exposure information in five
steps, and even at extremely low-light levels. Additionally,
the selected shutter speed and lens aperture settings are vis-
ible for maximum ease of operation for setting the desired
exposure.
To determine the correct exposure with the Nikon F2AS:
Switch ON the meter by moving the film-advance lever to the
20 standoff position; with this action, one of the LED indica-
tors will light, indicating overexposure, correct exposure or
underexposure. If the plus (+) indicator lights, increase the
shutter speed or decrease the aperture until the center ( ) indi-
cator just comes on and the (+) turns off; if the minus ( - )
indicator is lit, decrease the shutter speed or increase the aper-
ture until the center indicator lights. When two LEDs light
simultaneously (i.e., + and a, or—and o), the exposure setting
is within 1-stop of correct exposure; thus, be sure to adjust the
aperture setting slowly to get only the correct "center" (a)
exposure. Values for the five settings of the LEDs are described
in the figure on this page.
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