Canon EOS 5D Mark III Manual Book page 11

AF Configuration Tool [Parameters]
This setting allows obstacles that pass in front of the subject
to be ignored, as well as focusing on new subjects
[Locked on] can be effective when an obstacle crosses in front of the subject and when
focus jumps to the background,
[Locked on : -] [Responsive : +]
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Subject tracking characteristics
Ch o o s e any of
[Case] and push
b u t t o n f o r
Tracking sensitivity,
then adjust level
w i t h 5
button.
An example where [Locked
on: -2/-1] is more effective
When another player, or a
referee crosses in front of the
subject and focus can shift to the
foreground/background
Example where the referee momentarily
app ear s in front of the player b eing
tracked, then the player appeares again.
With the [Locked on: -1] set ting, the
referee in the foreground is not focused
on, and the AF system continuously tracks
the player.
With the AF Configuration Tool on the EOS 5D
Mark III, not only can you select from Case 1 -
Case 6, but three parameters for each can be
adjusted individually.
[Tracking sensitivity] is the parameter that can
be set to track a subject that the AF point had
been following until a different subject (or
background) got in the way.
The [Locked on: -2/-1] setting excludes subjects
that come into the AF point as obstacles, and
continues to focus on the original subject .
Selecting -2 results in the targeted subject being
tracked for a longer time before focus changes
to subject now in the AF point.
The [Responsive: +1/+2] setting determines that
subjects that come into the AF point are new
subjects to be focused, and quickly focuses. It is
also effective when you want to quickly focus
o n s u b j e c t s t h a t a re h i d d e n a n d a p p e a r
suddenly.
An example where
[Responsive: +1/+2] is
effective
When you want to focus on an
athlete who appears suddenly in
the frame.
Example where a skateboarder appeared
suddenly from the far wall. In a situation
like this, setting to [Responsive: +1/+2]
makes it possible to focus even quicker on
the skater that just appeared. (Photo top
left, shown to illustrate scene prior to the
skateboarder appearing,)
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