Canon Eos Rebel T6i 750d Instruction Manual

101
f: Changing the Autofocus Operation K
Suited for still subjects. When you 
press the shutter button halfway, the 
camera will focus only once.
When focus is achieved, the AF point 
that achieved focus will be displayed, 
and the focus indicator < o> in the 
viewfinder will also light up.
 With evaluative metering, the 
exposure setting will be set at the 
same time focus is achieved.
 While you hold down the shutter button halfway, the focus will be 
locked. You can then recompose the shot if...

f: Changing the Autofocus Operation K
102
This AF operation is suited for moving subjects when the focusing 
distance keeps changing. While you hold down the shutter button 
halfway, the subject will be focused on continuously.
The exposure is set at the moment the picture is taken.
 When the AF area selection mode is set to 19-point automatic 
selection AF (p.104), the camera fi rst uses the manually-selected AF 
point to focus. During autofocusing, if the subject moves away from 
the...

103
f: Changing the Autofocus Operation K
By default, the AF points light up in red when focus is achieved in low-
light conditions. In Creative Zone modes, you can set whether to have 
the AF points light up in red when focus is achieved (p.342).
Under low-light conditions, when you press the shutter button halfway, 
the built-in flash may fire a brief burst of flashes. This illuminates the 
subject to help autofocusing.
AF Points Lighting Up in Red
AF-Assist Beam with the Built-in Flash
The AF-assist...

104
19 AF points are provided for autofocusing. You can select the AF area selection mode and AF point(s) suiting the scene or subject.
You can select one of three AF area selection modes. See the next 
page for the selection procedure.
h: Single-point AF (Manual 
selection)
Select one AF point to focus.
q : Zone AF (Manual selection of 
zone)
The 19 AF points are divided into five 
zones for focusing.
r : 19-point automatic selection 
AF
All the AF points are used to focus.  This 
mode is set...

105
S Selecting the AF Area and AF Point K
1Press the  or  button 
(9 ).
Look through the viewfinder and 
press the < S> or < B> button.
2Press the  button.
Each time you press the  
button, the AF area selection mode 
changes.
 The AF area selection mode currently 
set is indicated on the top of the 
viewfinder.
h : Single-point AF 
(Manual selection)
q :Zone AF 
(Manual selection of zone)
r : 19-point automatic selection 
AF
Selecting the AF Area Selection Mode
AF area selection mode
Under [ 54:...

S Selecting the AF Area and AF Point K
106
You can manually select the AF point or zone. If 19-point automatic 
selection AF + AI Servo AF has been set, you can select any position 
where AI Servo AF is to start.
1Press the  or  button 
(9 ).
The AF points will be displayed in the 
viewfinder.
 In the Zone AF mode, the selected 
zone will be displayed.
2Select an AF point.
You can select an AF point by shifting 
horizontally with the  dial or 
vertically with the < 6> dial while 
holding down the < g>...

107
Select one AF point  to be used for focusing.
The 19 AF points are divided into five zones for focusing. All the AF 
points in the selected zone are used for the automatic selection of the 
focusing point(s). It is effective for moving subjects.
However, since it is inclined to focus the nearest subject, focusing a 
specific target is harder than with single-point AF.
The AF point(s) achieving focus is displayed as < S>.
AF Area Selection Modes K
h Single-point AF (Manual Selection)
q Zone AF (Manual...

AF Area Selection ModesK
108
All the AF points are used to focus.  This mode is set automatically in 
Basic Zone modes (except < x>). 
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.
With AI Servo AF, the manually-selected (p.106) AF 
point < S> is used first to achieve focus. The AF 
point(s) achieving focus is displayed as < S>.
r 19-point Automatic Selection AF
AF...

109
AF Area Selection ModesK
Maximum Lens Aperture: f/3.2 - f/5.6
With all AF points, cross-type AF  sensitive to both vertical and 
horizontal lines is possible. Howe ver, with the lenses below, the 
peripheral AF points will detect only  vertical or horizontal lines (no 
cross-type focusing).
Maximum Lens Aperture: f/1.0 - f/2.8
Besides cross-type focusing (verti cal and horizontal lines detected 
simultaneously), the center AF point can also perform high-precision, 
vertical-line sensitive AF.*
The...

110
Autofocus can fail to achieve focus (viewfinder’s focus indicator  
blinks) with certain subjec ts such as the following:
 Very low-contrast subjects
(Example: Blue sky, solid-color walls, etc.)
 Subjects in very low light
 Strongly backlit or reflective subjects
(Example: Car with a highly reflective body, etc.)
 Near and distant subjects framed close to an AF point 
(Example: Animal in a cage, etc.)
 Subjects such as dots of light framed close to an AF point
(Example: Night scenes, etc.)
...