Canon EOS Rebel XS Instruction Manual page 17

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Under [_ Custom Functions IC.Fn)I,
when [AF during Live View shooting]
(p.157) is set to [1: Quick mode] or [2: Live
mode]_ you can focus with AF. Quick mode
and Live mode use a different AF method
If you want precise focusing, magnify the
image and focus manually (p98)
C.Fn-7-1: Quick mode
This is the same as using AF (p60, 61 ) as usual with the dedicated AF
sensor. Although you can focus the desired area quickly, the Live View
image will be interrupted momentarily during the AF operation
Set to Quick mode, the lerls focus mode switch to <AF>, and the
AF mode to <ONE SHOT>.
AF point
_ Select the AF point.
_ Before starting Live View shooting,
select the AF point.
_ Press the <_> button and press the
<,;_> key to select the AF point.
_ Press the shutter button halfway for
shooting ready
'_ Diaptay the Live View image=
® Press <_>.
_ The Live View image will appear on
the LCD monitor
_ The selected AF point will be
displayed.
_ The focusing flame (larger frame) will
also be displayed
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