A3: focus tracking with lock- on, A4: af activation, 0 247), the – Nikon Df User Manual
Page 267: Ng with lock-on (0 247)
247
U
This option controls how autofocus adjusts to sudden large
changes in the distance to the subject when AF-C is selected during
viewfinder photography (0 59).
If Shutter/AF-ON is selected, both the shutter-release button and
the B button can be used to initiate autofocus. Select AF-ON
only to prevent the camera focusing when the shutter-release
button is pressed halfway.
a3: Focus Tracking with Lock-
On
G
button ➜ A Custom Settings menu
Option
Description
C 5 (Long)
When the distance to the subject changes abruptly, the
camera waits for the specified period 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.
( 4
D 3 (Normal)
) 2
E 1 (Short)
Off
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.
a4: AF Activation
G
button ➜ A Custom Settings menu