Canon EOS 5D MARK II Instruction Manual page 8

Av: Aperture-Priority AE
If the "30"" shutter speed blinks, it indica[es
underexposure.
Turn the <_> dial to set a larger aperture [smaller
f/number] until the blinking stops or set a higher lSO
speed.
If the "8000" shutter speed blinks, it indica[es
overexposure.
Turn the <_> dial to set a smaller aperture (larger
f/number) until the blinking stops or set a lower ISO
speed,
Aperture Display
The larger'[he f/number, the smaller the aperture opening will be. The
apeEures displayed will differ depending on the lens. If no lens is attached to
the camera "00" will be displayed for the aperture.
Depth of Field Preview #
Press the depth-of-field preview button
to stop down the lens to the current
aperture setting. You can check the
depth of field (range of acceptable focus)
through the viewfinder.
_] ® A higher flnurnber wi!l make rna[e 0ithe foreg[0und and background fall
within acceptable focus. However, the viewfinder will look darker.
_ If the depth of f eld i s difficult to discern; ho!d down the depth-0f-fie d
preview button While turning the <_ > dial,
® "The exposure will be locked (AE lock) while the depth-of-field preview
button is pressed.
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