Canon PowerShot SX110 IS User Manual - Page 104

102 The AF frame appears as follows when the shutter button is pressed halfway. - Green : In focus - Yellow : Focusing difficulty ([Center] option) - No AF frame : Focusing difficulty ([Face Detect] option) Face Detect Feature z When the camera detects faces, AF frames will be displayed on a maximum of three faces. At this point, the frame the camera judges to be the main subject appears in white while the others appear in gray. When the shutter button is pressed halfway and the camera focuses, up to 9 green AF frames may appear. You can also select the person to wish to focus on (p. 104). z The camera will shoot using [Center] not the [Face Detect] function if a white frame fails to appear and only gray frames display, or if a face is not detected. z The camera may mistakenly identify non-human subjects as a face. z In certain cases, faces may not be detected. Examples: - If faces are at the edge of the screen, or appear extremely small, large, dark or bright, relative to the overall composition. - Faces turned to the side or at a diagonal, or faces with a portion hidden.