Nikon D80 - Manual (Page 44)

32 Reference: More on Photography (All Modes) / Focus
The Electronic Range Finder
If the lens has a maximum aperture of f/5.6 or faster, the viewfi nder focus
indicator can be used to confi rm whether the portion of the subject in the
selected focus area is in focus. After positioning the subject in the active
focus area, press the shutter-release button halfway and rotate the lens fo-
cusing ring until the in-focus indicator (
●) is displayed.
Focal Plane Position
To determine the distance between your subject and the camera, measure
from the focal plane mark on the camera body. The distance between the
lens mounting fl ange (
11) and the focal plane is 46.5 mm (1.83 in.).
Manual Focus Controls used: Focus mode selector/lens focusing ring
Manual focus is available for lenses that do not support autofocus
(non-AF Nikkor lenses) or when autofocus does not produce the
desired results ( 29). To focus manually, set the focus-mode selec-
tor to M and adjust the lens focusing ring until the image displayed
on the clear matte fi eld in the viewfi nder is in focus. Photographs
can be taken at any time, even when the image is not in focus.
When using a lens that off ers A-M selection, select M when focusing manually. With lenses
that support M/A (autofocus with manual priority), focus can be adjusted manually with the
lens set to M or M/A. See the documentation provided with your lens for details.