Canon EOS-1D X Mark II DSLR Camera (Body Only) - Manual (Page 53)

53
If you turn on the power switch and the date/time/zone setting
screen appears, see page 55 to set the date/time/zone.
< 1 > : The camera turns on.
< R >: The camera turns on. The
Multi function lock will take
effect (p.66).
< 2 > : The camera is turned off and
does not function. Set to this
position when not using the
camera.
Whenever you set the power switch
to <
1 / R > or < 2 >, sensor
cleaning will be performed
automatically. (A small sound may be
heard.) During the sensor cleaning,
the LCD monitor will display <
f >.
You can still shoot during sensor cleaning by pressing the shutter
button halfway (p.62) to stop cleaning and take a picture.
If you turn on/off the power switch < 1 / R >< 2 > at a short
interval, the < f > icon may not be displayed. This is normal and
not a malfunction.
To save battery power, the camera turns off automatically after
approx. 1 minute of non-operation. To turn on the camera again, just
press the shutter button halfway (p.62).
You can change the auto power off time with [ 5 2: Auto power off ]
(p.76).
Turning on the Power
Automatic Sensor Cleaning
3 Auto Power Off
If you set the power switch to < 2 > while an image is being recorded to
the card, [ Recording... ] will be displayed and the power will turn off after the
recording finishes.