Canon EOS 5D MARK II Instruction Manual page 46

_,_, Shooting Movies
Notes for auto exposure, shutter=priority AE, and aperture=priority AE
shooting
_,_ During movie shooting, you can lock the exposure (AE lock) by pressing
the <--X-> button (p.98). When applying AE lock during movie shooting,
you can cancel it by pressing the <r:[:l> button (except in C3/1_]
modes).
You can set the exposure compensation by setting the power switch to
<..a> and turning the <0> dial (except in r-3/[_ modes).
The ISO speed will be set automatically within ISO 100-6400. If [,_,C.Fn
1-3: ISO expansion] is set to [1: On] (p.193), the ISO speed will be set
automatically within ISO 100-12800 (H1). (In Tv mode, the range will be
ISO 100-6400.)
If [,_C.Fn It -3: Highlight tone priority] is set to [1: Enable] (p.196), the
ISO speed will be set automatically within ISO 200-6400.
The ISO speed and shutter speed displayed at the screen bottom when
you press the shutter button halfway is the exposure setting for still
photos (p.135). The exposure setting for movie shooting is not displayed.
Note that the exposure setting for movie shooting may differ from that for
still shootin9_
Manual Exposure Shooting
When the shooting mode is set to <M>, you can manually set the ISO
speed, shutter speed, and aperture for movie shooting.
Set the Mode Dial to <M>.
Set the ISO speed.
_ Press the <lS0._> button and look
at the screen while turning the <_>
dial to set the ISO speed.
_ For details on the ISO speed, see
page 57.
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