Canon PowerShot SX420 IS Black 手册

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页码 347
124
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 Contents
 
To reduce the AF frame size, press the [
] button and set 
[AF Frame Size] on the [
 
The AF frame size is set to [Normal] when you use the digital 
zoom (= 74) or digital tele-converter (= 122).
 
To compose shots so that subjects are positioned at the edge or 
in a corner, first aim the camera to capture the subject in an AF 
frame, and then hold the shutter button halfway down. As you 
continue to hold the shutter button halfway, recompose the shot 
as desired, and then press the shutter button all the way down 
(Focus Lock).
 
The AF frame position is enlarged when you press the shutter 
button halfway with [AF-Point Zoom] (= 87) set to [On].
Face AiAF
 Still Images 
 Movies
 
Detects people’s faces, and then sets the focus, exposure 
(evaluative metering only), and white balance ([ ] only).
 
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.