Af Point Activation Area - Canon EOS 1D Mark II N Instruction Manual

AF Point Activation Area

C.Fn-17 can be set to expand the AF point's activation area to include
the surrounding AF points. (C.Fn-17) (p.167)
Set Custom Functions with
• Expanding the activation area to 7 points
This larger activation area makes it easier to focus subjects moving
erratically.
:Selected AF point
:AF points in expanded
activation area
• Expanding the activation area to 7 or 13 AF points automatically
C.Fn-17-2
As shown below, the AF point activation area expands automatically to
suit the lens focal length and AF mode. This is effective when the
subject's movement is unpredictable.
AF
Mode
Shorter than 200mm
One-
Shot
AF
The AF activation area does not expand
AI
Servo
AF
86
3
(p.167)
Lens Focal Length
automatically.
C.Fn-17
n
< >.
The expanded AF point activation
area is not displayed in the
viewfinder.
When focus is achieved in the One-
Shot AF mode, the selected AF point
and AF point(s) achieving focus will
light.
200mm or longer
The activation area expands by 1 AF point
C.Fn-17-1
(p.167)