Nikon 25446 a2: Center Focus Point, a3: Built-in AF-assistIlluminator

a2: Center Focus Point

This option (available in all shooting modes) determines the size of the center focus point.

	Option	Viewfinder display	Description
c	Normal zone		Focus on stationary subjects that can be easily framed
	(default)		in the focus point.

Focus on moving subjects. Not available when Auto-

7 Wide zonearea is selected for Custom Setting a1 (AF-area

mode).

See page 54 for more information on focus settings.

a3: Built-in AF-assist Illuminator

Choose whether the built-in AF-assist illuminator lights to assist the focus operation when lighting is poor. This option is available in all shooting modes except land m.

	Option	Description
		If the subject is poorly lit, the AF-assist illuminator will light to assist the focus
	On	operation in single-servo AF (AF-Sselected for autofocus mode, or single-servo AF
		selected in AF-Aautofocus mode) when Single point, Auto-area, or 3D-tracking
	(default)
		(11 points) is selected for Custom Setting a1 (AF-area mode) or when Custom
		Setting a1 is set to Dynamic area and the center focus point is selected.
L	Off	The AF-assist illuminator does not light to assist the focus operation. The camera
		may not be able to focus using autofocus when lighting is poor.

AThe AF-Assist Illuminator

The AF-assist illuminator has a range of about 0.5–3.0 m (1 ft. 8 in.–9 ft. 10 in.); when using the illuminator, use a lens with a focal length of 24–200 mm and remove the lens hood.

ASee Also

See page 231 for restrictions on the lenses that can be used with AF assist.

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