Canon EOS-5D Instruction Manual page 91

If the exposure level mark <s> blinks at the <G> or <F> level, it indicates
that the exposure level exceeds the standard exposure by ±2 stops.
Set the exposure.
5
Check the exposure level and set the
desired shutter speed and aperture
value.
: Standard exposure level.
: To set it to the standard
: To set it to the standard
Take the picture.
6
a Manual Exposure
exposure level, set a slower
shutter speed or a larger
aperture.
exposure level, set a faster
shutter speed or a smaller
aperture.
91