Nikon D90 user manual Focus, Autofocus mode Description

Focus

Focus can be adjusted automatically (see “Autofocus,” below) or manually (pg. 59). The user can also select the focus point for automatic or manual focus (pg. 59) or use focus lock to focus to recompose photographs after focusing (pg. 57).

Autofocus

When the focus mode selector is set to AF, the camera Focus mode selector

focuses automatically when the shutter-release h button is pressed halfway. In single-point AF, a beep

will sound when the camera focuses. No beep will sound when AF-Ais selected in m (sports) mode or

when continuous-servo autofocus is used (note that continuous-servo autofocus may be selected

automatically when shooting moving subjects in AF-Aautofocus mode).

With lenses that offers A-M selection, select A when using autofocus. With lenses that support M/A (autofocus with manual priority), select M/A. If the lens does not support autofocus or the camera is unable to focus using autofocus, use manual focus

(pg. 59).

❚❚Autofocus Mode

The following autofocus modes are available when the focus mode selector is set to AF:

	Autofocus mode	Description
	Auto select	Camera automatically selects single-servo autofocus when
AF-A		subject is stationary, continuous-servo autofocus when subject is
	(default setting)
		moving. Shutter can only be released if camera is able to focus.
		For stationary subjects. Focus locks when shutter-release button
AF-S	Single-servo AF	is pressed halfway. Shutter can only be released when in-focus
		indicator is displayed.
		For moving subjects. Camera focuses continuously while
AF-C	Continuous-servo AF	shutter-release button is pressed halfway. Photographs can be
		taken even when in-focus indicator is not displayed.

To choose the autofocus mode, press the B button. The focus mode changes each time the B button is pressed.

Bbutton Main command dial Control panel

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