Nikon D610 a3: Focus Tracking with Lock-On Gbutton ➜ ACustom Settings menu, a4: AF Point Illumination, a5: Focus Point Wrap-Around

a3: 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 when AF-Cis selected or continuous-servo autofocus is selected when the camera is in AF-Amode for viewfinder photography (0 97).

Option Description

C5 (Long)

( 4		When the distance to the subject changes abruptly, the camera waits for the
		specified period before adjusting the distance to the subject. This prevents
D	3 (Normal)
		the camera from refocusing when the subject is briefly obscured by objects
)	2	passing through the frame.

E1 (Short)

The camera immediately adjusts focus when the distance to the subject

Off changes. Use when photographing a series of subjects at varying distances in quick succession.

a4: 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 the brightness of
On	the background. Depending on the brightness of the background, the
	selected focus point may be difficult to see.
Off	The selected focus point is not highlighted. The area outside the current crop
	is shown in grey (0 90).

a5: Focus Point Wrap-Around

Gbutton ➜ ACustom Settings menu

Choose whether focus-point selection “wraps around” from one edge of the viewfinder to another.

	Option	Description
		Focus-point selection “wraps around” from top to
		bottom, bottom to top, right to left, and left to right, w	q
	Wrap	so that, for example, pressing 2 when a focus point
		at the right edge of the display is highlighted (q)
		selects the corresponding focus point at the left
U		edge of the display (w).
	No wrap	The focus-point display is bounded by the outermost focus points so that, for
		example, pressing 2 when a focus point at the right edge of the display is
		selected has no effect.

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