Stop-Down Exposure Measurement - Nikon FA Instruction Manual

TECHNICAL INFORMATION/PHOTOGRAPHY TECHNIQUES

STOP-DOWN EXPOSURE MEASUREMENT

Stop-down exposure measurement must be made whenever
the aperture ring of the lens doesn't couple with the meter
coupling lever ,~ of the camera. After focusing and switching on
the meter, follow these procedures:
For Lenses with Automatic Diaphragms
In P, S, or A mode: Push the depth-of-field preview lever all the
way down, manually stop the lens down or open it up to your
desired f-number, and trip the shutter while holding the lever.
Note that, with the lever depressed. metering is automatically
switched to centerweighted
In M mode: Hold down the preview lever and turn the shutter
speed dial and/or lens aperture ring until the LCD shows -+,
indicating correct exposure on manual. Release the preview
lever and take the shot.
•If the depth-of-field /ever is pushed down in the P or S mode,
the shooting mode is automatically switched to the A mode; also
the LCD shows the shutter speed selected by the camera for the
aperture in use In the s mode, the shutter speed indication
showing the shutter speed set on the dial does not disappear.
For Lenses or Accessories Without Automatic
Diaphragms
In A mode only: P and S modes should not be used. Stop the
lens down manually until the desired shutter speed appears in
the viewfinder Then take the picture.
In M mode: Adjust the shutter speed or aperture until the -+ indi-
cation appears above M
54
For Fixed-Aperture Lenses, Photomicrography, or
Astrophotography
In P, S, or A mode: No adjustment of aperture and shutter
speed is necessary; just take the picture.In M mode: Adjust the
shutter speed dial until the LCD shows -+, indicating correct
exposure on manual. If correct exposure is unobtainable, use an
ND (neutral density) filter or electronic flash unit As a last resort,
change to a faster or slower film.
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