Canon IXUS 172 User Manual page 52

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Face AiAF
Detects people's faces, and then sets the focus, exposure (evaluative
metering only), and white balance ([
After you aim the camera at the subject, a white frame is displayed
around the person's face determined by the camera to be the main
subject, and up to two gray frames are displayed around other detected
faces.
When the camera detects movement, frames will follow moving subjects,
within a certain range.
After you press the shutter button halfway, up to nine green frames are
displayed around faces in focus.
If faces are not detected, or when only gray frames are displayed
(without a white frame), up to nine green frames are displayed in the
areas in focus when you press the shutter button halfway.
If faces are not detected when Servo AF
AF frame is displayed in the center of the screen when you press
the shutter button halfway.
Examples of faces that cannot be detected:
-
Subjects that are distant or extremely close
-
Subjects that are dark or light
-
Faces in profile, at an angle, or partly hidden
The camera may misinterpret non-human subjects as faces.
No AF frames are displayed if the camera cannot focus when you
press the shutter button halfway.
Downloaded From camera-usermanual.com Canon Manuals
Still Images
Movies
] only).
(=
53) is set to [On], the
Choosing Subjects to Focus On (Tracking AF)
Shoot after choosing a subject to focus on as follows.
1
Choose [Tracking AF].
z
z
Follow the steps in "Changing the AF
Frame Mode"
[Tracking AF].
z
z
[
screen.
2
Choose a subject to focus on.
z
z
Aim the camera so that [
desired subject.
z
z
Press the shutter button halfway. [
changes to a blue [
the subject as the camera continues to
adjust the focus and exposure (Servo AF)
(=
3
Shoot.
z
z
Press the shutter button all the way down
to shoot.
[Servo AF]
(=
53) is set to [On] and cannot be changed.
Tracking may not be possible when subjects are too small or move
too rapidly, or when subject color or brightness matches that of the
background too closely.
[AF-Point Zoom] on the [4] tab is not available.
[e] and [u] are not available.
Still Images
(=
51) to choose
] is displayed in the center of the
] is on the
]
], which follows
53).
Before Use
Before Use
Basic Guide
Basic Guide
Advanced Guide
Advanced Guide
Camera Basics
Camera Basics
Auto Mode
Auto Mode
Other Shooting
Other Shooting
Modes
Modes
P Mode
P Mode
Playback Mode
Playback Mode
Setting Menu
Setting Menu
Accessories
Accessories
Appendix
Appendix
Index
Index
52

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