Canon EOS 600D Instruction Manual page 158

3 Menu Function Settings
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 holding Press the shutter button halfway to execute AF. While holding Press the shutter button halfway to execute AF. While holding
down the <w> button, press the shutter button to take a still photo
without executing AF. Convenient when you do not want to without executing AF. Convenient when you do not want to without executing AF. Convenient when you do not want to
autofocus when taking a still photo during movie shooting. AE lock autofocus when taking a still photo during movie shooting. AE lock autofocus when taking a still photo during movie shooting. AE lock
is not possible.
• AE/AF, no AE lock:
Press the shutter button halfway for metering. For AF, press the Press the shutter button halfway for metering. For AF, press the Press the shutter button halfway for metering. For AF, press the
<w> button. AE lock is not possible. > button. AE lock is not possible. > button. AE lock is not possible.
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> button, press the shutter button to take a still photo > button, press the shutter button to take a still photo