Nikon D1 - Manual (Page 33)

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6 .11 Half-press the shutter release button
Note
B
Center the focus brackets on your subject (A) and lightly press the
shutter-release button half way (B). The camera will adjust focus
automatically, and the results of the autofocus operation will appear in
the viewfinder.
The subject is in focus.
The camera is focused on an area between the camera and the
subject.
The camera is focused on an area behind the subject.
The camera is unable to focus using autofocus. See “Camera
Settings: Autofocus” for instructions.
To focus on a subject that will not be in the center of the final
composition, change the focus area (see “Camera Settings: Focus
Area”) or use focus lock (see “Camera Settings: Focus Lock”).
6 .12 Check the indicators in the viewfinder
With the shutter-button held half way, check the indicators in the
viewfinder. By default, aperture and shutter speed are displayed in the
smallest possible increments (see “Custom Settings,” item 2, for
information on changing the size of the increments used for displaying
aperture, shutter speed, and exposure compensation).
If the subject is too bright or too dark, one of the following indicators will
appear in the viewfinder or the control panel on top of the camera.
HI
Subject is too bright. Use a Neutral Density (ND) filter.
Lo Subject is too dark. Use a flash.
First Steps: Take a Photograph
A
The viewfinder shows approximately 96% of the image actually exposed on the CCD.
The area that appears in the final photograph will be slightly larger than the scene
viewed through the viewfinder.