Nikon D700 manual A4 Focus Tracking with Lock-On, A5 AF Activation, 287

a4: Focus Tracking with Lock-On

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

Option	Description
C 5 (Long)	When the distance to the subject changes abruptly, the
Y 4
	camera waits for the specified period before adjusting
3 (Normal)
D (default)	the distance to the subject. This prevents the camera
	from refocusing when the subject is briefly obscured
Z 2
	by objects passing through the frame.
E 1 (Short)
	The camera immediately adjusts focus when the
Off	distance to the subject changes. Use when
	photographing a series of subjects at varying distances
	in quick succession.

a5: AF Activation

This option controls whether both the shutter-release button and the Bbutton can be used to initiate autofocus, or whether autofocus is only initiated when the Bbutton is pressed.

Option	Description
Shutter/	Autofocus can be performed with the Bbutton or by
AF-ON
	pressing the shutter-release button halfway.
(default)
AF-ON only	Autofocus can only be performed using the Bbutton.

U

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