Canon EOS 5D Mk.4 Manual

109
For pinpoint focusing over a narrower area than 
with Single-point AF. Select one AF point <
O> to 
focus.
Effective for pinpoint focusing or focusing on 
overlapping subjects such as an animal in a cage.
Since Single-point Spot AF covers a very small 
area, focusing may be difficult during handheld 
shooting or for a moving subject.
Select one AF point < S> to be used for focusing.
The manually-selected AF point < S> and adjacent AF points < w> 
(above, below, on the left, and on the right) are...

AF Area Selection ModesN
110
The manually-selected AF point < S> and surrounding AF points < w> 
are used to focus. Focusing is performed over a wider area than with 
AF point expansion (manual selection ).  Effective when it is difficult to 
track a moving subject with just one AF point.
AI Servo AF and One-Shot AF work in the same way as with AF point 
expansion (manual selection ) mode (p.109).
The AF area is divided into nine focusing zones for focusing. All the AF 
points in the selected zone are...

111
AF Area Selection ModesN
The AF area is divided into three focusing zones (left, center, and right) 
for focusing. Since the focusing area  is larger than with Zone AF and all 
the AF points in the selected zone are used for the automatic AF point 
selection, it is superior to single- point AF and AF point expansion in 
tracking the subject, and it is effective for moving subjects.
However, since it is inclined to  focus on the nearest subject, focusing on 
a specific target may be more difficult....

AF Area Selection ModesN
112
 When AI Servo AF mode is set for Zone AF, Large Zone AF, or Automatic 
selection AF, the active AF point < S> will keep switching to track the 
subject. However, under certain shooti ng conditions (such as when the 
subject is small), it may no t be able to track the subject.
  With Single-point Spot AF, focusing with an EOS-dedicated, external 
Speedlite’s AF-assist beam may be difficult.
  If a peripheral AF point or a wide-angle or telephoto lens is used, 
achieving...

113
The camera’s AF sensor has 61 AF points. The illustration below shows 
the AF sensor pattern corresponding to each AF point. When using 
lenses with a maximum aperture of f/2.8 or faster, high-precision AF is 
possible at the viewfinder center.
AF Sensor
Depending on the lens attached to the camera, the number of usable 
AF points, AF point patterns, Area AF frame shape, etc. vary. For 
details, see “Lenses and Usable AF Points” on page 115.
Diagram
Cross-type  focusing:
f/4 horizontal + f/5.6 or...

AF Sensor
114
These focusing sensors are geared to obtain 
higher precision focusing for lenses with a 
maximum aperture of f/2.8 or faster. A diagonal 
cross pattern makes it easier to focus subjects 
that may be difficult to focus. They cover the five 
AF points vertically aligned at the center.
These focusing sensors are geared to obtain 
high-precision focusing for lenses with a 
maximum aperture of f/4 or faster. Since they 
have a horizontal pattern, they can detect 
vertical lines.
These focusing...

115
Autofocusing with 61 points is possible. All the AF area selection modes 
are selectable.
:
Dual cross-type AF point. Subject 
tracking is superior and the focusing 
precision is higher than with other AF 
points.
: Cross-type AF point. Subject tracking is superior and high-
precision focusing is achieved.
: AF points sensitive to horizontal  lines.
Lenses and Usable AF Points
Group A
  Although the camera has 61 AF points,  the number of usable AF 
points, focusing patterns, Area AF frame shape,...

Lenses and Usable AF Points
116
Autofocusing with 61 points is possible. All the AF area selection modes 
are selectable.
:
Dual cross-type AF point. Subject 
tracking is superior and the focusing 
precision is higher than with other AF 
points.
: Cross-type AF point. Subject tracking is superior and high-
precision focusing is achieved.
:
AF points sensitive to horizontal lines.
Autofocusing with 61 points is possi ble. All the AF area selection modes 
are selectable.
: Cross-type AF point. Subject...

117
Lenses and Usable AF Points
Autofocusing with 61 points is possible. All the AF area selection modes 
are selectable.
: Cross-type AF point. Subject tracking is superior and high-
precision focusing is achieved.
: AF points sensitive to horizontal 
lines.
Autofocusing with 61 points is possi ble. All the AF area selection modes 
are selectable.
If an extender is attached (extender compatible lenses only) and the 
maximum aperture is f/8 (greater than f/5.6 but not exceeding f/8), AF 
will be...

Lenses and Usable AF Points
118
Autofocusing with the 47 points shown in the diagram is possible. (Not 
possible with all 61 AF points.) All the AF area selection modes are 
selectable. During automatic AF point selection, the outer frame 
marking the AF area (Area AF frame) will be different from 61-point 
Automatic selection AF.
: Cross-type AF point. Subject tracking is superior and high-
precision focusing is achieved.
: AF points sensitive to horizontal 
lines.
: Disabled AF points (not...