Manual focus – Nikon D100 User Manual
Page 86
Taking Photographs—Focus
Focus
74
A-M Selection/Autofocus with Manual Priority
When using a lens that offers A-M selection, select M when focusing manually. With
lenses that support M/A (autofocus with manual priority), focus can be adjusted manu-
ally with the lens set to M or M/A. See the documentation provided with your lens for
details.
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 flange
and the focal plane is 46.5 mm (1.83˝).
Manual Focus
Manual focus is available for lenses that do not support autofocus (non-AF
Nikkor lenses) or when the autofocus does not produce the desired results (
73). To focus manually, set the focus-mode selector to M and adjust the lens
focusing ring until the image displayed on the clear matte field in the viewfinder
is in focus. Photographs can be taken at any time, even when the image is
not in focus.
The Electronic Range Finder
If the lens has a maximum aperture of f/5.6 or
faster, the viewfinder focus indicator can be used
to confirm whether the subject in the selected
focus area is in focus. After positioning your sub-
ject in the active focus area, press the shutter-re-
lease button halfway and rotate the lens focusing
ring until the in-focus indicator (●) is displayed.