Canon 5dsr Manual

91
S Selecting the AF Area and AF Point N
AF point expansion (Manual 
selection, surrounding points)
The manually-selected AF point  
and the surrounding AF points < w> are 
used to focus.
Zone AF
(Manual selection of zone)
One of nine zones is used to focus.
61-point automatic selection 
AF
The Area AF frame (entire AF area) is 
used to focus.  This mode is set 
automatically in the < A> mode. 

S Selecting the AF Area and AF PointN
92
1Press the  button. (9 )
2Press the  button.
Look through the viewfinder and 
press the < B> button.
 Each time you press the  
button, the AF area selection mode 
changes.
Selecting the AF Area Selection Mode
 With [2 4: Select AF area selec. mode ], you can limit the selectable 
AF area selection modes (p.125).
 If you set [ 24: AF area selection method ] to [S9Main Dial], you 
can select the AF area selection mode by pressing the < S> button, 
then turning...

93
S Selecting the AF Area and AF Point N
You can manually select the AF point or zone.
1Press the  button. (9 )
 The AF points will be displayed in the 
viewfinder.
 In AF point expansion modes, 
adjacent AF points will also be 
displayed.
 In the Zone AF mode, the selected 
zone will be displayed.
2Select an AF point.
The AF point selection will change in 
the direction you tilt < 9>. If you 
press < 9> straight down, the center 
AF point (or center zone) will be 
selected.
 You can also select a...

S Selecting the AF Area and AF PointN
94
Pressing the < S> button lights up the AF points that are cross-type AF 
points for high-precision autofocus ing. The blinking AF points are 
horizontal-line or vertical-line sens itive. For details, see pages 99-104.
You can register a frequently-used AF point to the camera.
When you use the button set with the [ 83: Custom Controls] (p.413) 
menu’s detailed settings screens for [ Metering and AF start], [Switch 
to registered AF point ], [Direct AF point...

95
For pinpoint focusing over a narrower area than 
with single-point AF (manual selection). Select one 
AF point < > to focus.
Effective for pinpoint focusing or focusing 
overlapping subjects such as an animal in a cage.
Since Single-point Spot AF (manual selection) 
covers a very small area, focusing may be difficult 
during hand-held shooting or for a moving subject.
Select one AF point  to be used for focusing.
The manually-selected AF point < S> and adjacent AF points < w> 
(above, below, on the...

AF Area Selection ModesN
96
The manually-selected AF point < S> and surrounding AF points < w> 
are used to focus. The AF point exp ansion is larger than with AF point 
expansion (manual selection ), so  the focusing is executed over a 
wider area. Effective when it is diff icult 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.95).
The AF area is divided into nine focusing zones for focusing. All...

97
AF Area Selection ModesN
The Area AF frame (entire AF area) is used to focus. This mode is set 
automatically in the  mode.
The AF point(s) achieving focus is displayed as < S>.
With One-Shot AF, pressing the shutter button 
halfway will display the AF point(s) < S> that 
achieved focus. If multiple AF points are displayed, 
it means they all have achieved focus. This mode 
tends to focus on the nearest subject.
With AI Servo AF, you can set the AI Servo AF’s 
starting position with [ Initial AF pt,...

AF Area Selection ModesN
98
When AI Servo AF mode is set with 61-point automatic selection AF, or 
Zone AF (manual selection of zone), the active AF point < S> will keep 
switching to track the subject. However, under certain shooting 
conditions (such as when the subject is small), it may not be able to track 
the subject. Also, in low temperat ures, the tracking response may 
become slower.
 With Single-point Spot AF (manual selection), focusing with an EOS-
dedicated, external Speedlite’s AF-assist...

99
The camera’s AF sensor has 61 AF points. The illustration below shows the AF 
sensor pattern corresponding to each AF point. With f/2.8 or larger maximum 
aperture lenses, high-precision AF is possible at the viewfinder center.
Depending on the lens attached to the camera, the number of usable 
AF points and AF pattern will differ. For details, see pages 100-108.
AF Sensor
These focusing sensors are geared to obtain higher 
precision focusing with f/2.8 or larger maximum aperture 
lenses. A diagonal...

100
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 and focusing patterns will differ depending...