A4: Focus Tracking With Lock-On; A5: Af Activation; A6: Af Point Illumination - Nikon D300S User Manual

a4: Focus Tracking with Lock-On

This option controls how autofocus adjusts to sudden large
changes in the distance to the subject.
Option
C Long
D Normal
E Short
Off

a5: AF Activation

If Shutter/AF-ON is selected, both the
shutter-release button and the B button
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

Choose whether the active focus point is highlighted in red in the
viewfinder.
Option
Auto
On
U
Off
266
When the distance to the subject changes abruptly, the
camera waits for the specified period (long, normal, or
short) before adjusting the distance to the subject. This
prevents the camera from refocusing when the subject is
briefly obscured by objects passing through the frame.
The camera immediately adjusts focus when the distance to
the subject changes. Use when photographing a series of
subjects at varying distances in quick succession.
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 the background. Depending on the
brightness of the background, the selected focus point may
be difficult to see.
The selected focus point is not highlighted.
G button A Custom Settings menu
Description
G button A Custom Settings menu
G button A Custom Settings menu
Description