Nikon D300s, D300S (Body Only) user manual A5 AF Activation, A6 AF Point Illumination, 266, Short

a4: Focus Tracking with Lock-On Gbutton ➜ ACustom Settings menu

This option controls how autofocus adjusts to sudden large changes in the distance to the subject.

Option	Description
C Long	When the distance to the subject changes abruptly, the
	camera waits for the specified period (long, normal, or

DNormal short) before adjusting the distance to the subject. This

	prevents the camera from refocusing when the subject is
E Short
	briefly obscured by objects passing through the frame.
	The camera immediately adjusts focus when the distance to
Off	the subject changes. Use when photographing a series of
	subjects at varying distances in quick succession.

a5: AF Activation

Gbutton ➜ ACustom Settings menu

If Shutter/AF-ONis selected, both the shutter-release button and the Bbutton can be used to initiate autofocus. If AF-ON only is selected, autofocus is only initiated when the B button is pressed.

a6: AF Point Illumination

Gbutton ➜ ACustom Settings menu

Choose whether the active focus point is highlighted in red in the viewfinder.

	Option	Description
	Auto	The selected focus point is automatically highlighted as
		needed to establish contrast with the background.
		The selected focus point is always highlighted, regardless of
	On	the brightness of the background. Depending on the
U		brightness of the background, the selected focus point may
		be difficult to see.
	Off	The selected focus point is not highlighted.

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