Canon EOS Rebel T3 18-55mm IS II Lens Kit - Manual (Page 146)

3 Menu Function Settings
146
kShutter/AE lock button
You can change the function assigned to the shutter button’s halfway
position and to the AE lock button.
• AF/AE lock:
Normal function. Press the shutter button halfway to execute AF.
Press the <w> button for AE lock.
• AE lock/AF:
Press the shutter button halfway for AE lock. For AF, press the
<w> button. Convenient when you want to focus and meter at
different parts of the picture.
• AF/AF lock, no AE lock:
Press the shutter button halfway to execute AF. While you
autofocus by pressing the shutter button halfway, you can pause
the autofocus by holding down the <w> button. You can resume
the autofocus by letting go of the <w> button. AE lock is not
possible.
• AE/AF, no AE lock:
Press the shutter button halfway for metering. For AF, press the
<w> button. AE lock is not possible.
kHighlight tone priority
If [Enable] is set, highlight detail will be improved. The dynamic
range is expanded from the standard 18% gray to bright highlights.
The gradation between the grays and highlights becomes smoother.
The settable ISO speed range will be ISO 200-6400. The Auto
Lighting Optimizer will also be set automatically to [Disable] and
cannot be changed.
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