Nikon D40x Manuel D’Utilisation

Focus can be adjusted automatically (see “Focus  Mode,”  below)  or  manually  (   28).    The
user can also select the focus area for automatic or manual focus (  24, 25) or use focus lock
to focus to recompose photographs after focusing (  26).

Choose how the camera focuses.  AF-S and AF-C are available only in P, S, A, and M modes.

If the subject is poorly lit, the AF-assist illuminator will light automatically
to assist the autofocus operation when the shutter-release button is
pressed halfway.  The AF-assist illuminator will not light in continuous-
servo AF or manual focus mode, in 

, or   modes, or if the center focus

area is not selected or if Off has been selected for Custom Setting 9 (AF
assist).  The illuminator has a range of about 0.5–3.0m (1ft.  8in.–9ft.
10in.); when using the illuminator, use a lens with a focal length of 24–
200mm and remove the lens hood.

Focus mode can also be selected from the Custom Settings menu.

Auto-servo AF
(default setting)

Camera automatically selects single-servo autofocus when subject is judged
to be stationary, continuous-servo autofocus when subject is judged to be
moving.

Single-servo AF

For stationary subjects.  Focus locks when shutter-release button is pressed
halfway.

Continuous-
servo AF

For moving subjects.  Camera focuses continuously while shutter-release but-
ton is pressed halfway.  Priority is given to shutter response, meaning that
shutter may sometimes be released before in-focus indicator (z) is displayed
in viewfinder.

Manual focus

User focuses manually (  28).