Canon EOS 30D - Manual (Page 43)

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You can set the auto power-off time for the camera to turn off
automatically after a set time of idle operation. If you do not want the
camera to turn off automatically, set this to [Off]. After the power turns
off, you can turn on the camera again by pressing the shutter button or
other button.
1
Select [Auto power off].
Turn the <5> dial to select [c Auto
power off], then press <0>.
2
Set the desired time.
Turn the <5> dial to select the time,
then press <0>.
3 Set the power-off time/Auto power off
When the camera has turned off by auto power off, you can turn on the
camera by pressing the shutter button, <M> button, or <x> button. If
the shooting mode is one of the Creative Zone modes, you can also press
the <A> button to wake up the camera.
3 CF Card Reminder
This prevents shooting if there is no CF card in the camera. This can be
set in all shooting modes.
1
Select [Shoot w/o card].
Turn the <5> dial to select [z
Shoot w/o card], then press <0>.
2
Select [Off].
Turn the <5> dial to select [Off],
then press <0>.
If [Off] has been set and you press the shutter button while there is no CF
card in the camera, “no CF” will be displayed in the viewfinder and LCD
panel.