Focus, Focus mode – Nikon D40 User Manual

Page 35

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Reference: More on Photography (All Modes)/Focus

23

Focus

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).

Focus Mode

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

Controls used

The AF-Assist Illuminator

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 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.

2—Focus Mode (

75)

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

Focus mode

Description

AF-A

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. Shutter can be released if camera is able to focus.

AF-S

Single-servo AF

For stationary subjects. Focus locks when shutter-release button is pressed
halfway. Shutter can be released if camera is able to focus.

AF-C

Continuous-
servo AF

For moving subjects. Camera focuses continuously while shutter-release but-
ton is pressed halfway. Shutter can be released if camera is able to focus.

MF

Manual focus

User focuses manually ( 28).

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