Canon IXUS 115 HS - Manual (Page 95)

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You can change the AF (Auto Focus) frame mode to match the scene you
want to shoot.
Choose [AF Frame].
 Press the n button to choose [AF
Frame] from the 4 tab, then press the qr
buttons to choose an option.
Face AiAF
• Detects people’s faces and sets the focus, exposure (evaluative metering
only) and white balance (
only).
• When the camera is pointed at subjects, a white frame appears on the face
the camera judges to be the main subject, and gray frames (max. 2) will
appear on other faces.
• A frame will follow a moving subject within a certain range.
• When the shutter button is pressed halfway, up to 9 green frames will
appear on faces that the camera focuses on.
Changing the AF Frame Mode
• If a face is not detected and only gray frames (no white frame) appear, up
to 9 green frames will appear on the areas the camera focuses on when
the shutter button is pressed halfway.
• If a face is not detected when Servo AF (p. 100) is set to [On], the AF
frame will appear in the center of the screen when you press the shutter
button halfway.
• Examples of faces that cannot be detected:
- Subjects that are far away or extremely close
- Subjects that are dark or light
- Faces turned to the side or at an angle, or faces with a portion hidden
• The camera may mistakenly identify non-human subjects as a face.
• If the camera cannot focus when you press the shutter button halfway,
the AF frame will not appear.