Canon PowerShot SD850 IS PowerShot SD850 IS / DIGITAL IXUS 950 IS Camera User - Page 51
Switching between Focusing Modes, Rec. Menu, AiAF]
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Switching between Focusing Modes Shooting The autofocus frame (AF frame) indicates the area used to set the focus. Select from among the following three focusing methods. (No frame) Face Detect On Off You can have the camera automatically detect the position of a face and use this data to set the focus and exposure* while shooting. In addition, the camera will meter the subject so that the face is correctly illuminated when the flash fires. If a face is not detected, shooting will take place with [On]. *Only in evaluative metering mode (p. 55). The camera detects the subject and highlights the AF frames, from 9 available points, that it will use to determine the focus. The camera focuses using the center AF frame. This is convenient for focusing on a specific part of a subject with greater certainty. 1 (Rec.) Menu [AiAF] [Face Detect]*/[On]/[Off]. See Menus and Settings (p. 23). *Default setting. [Face Detect] cannot be used when the LCD monitor is turned off. z The AF frame appears as follows (when the LCD monitor is on) when the shutter button is pressed halfway. - Green: Shooting preparations complete - Yellow: Focusing difficulty (AiAF set to [Off]) - No Display: Focusing difficulty (AiAF set to [On]) 49