Canon EOS 50E - Manual (Page 44)

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II. AF Modes and Metering Modes
Proper Operating Conditions
A different user must use a different
calibration No.
If two or more people use the same
calibration No,, Eye-Controlled Autofocus
will not function properly. Each user must
calibrate
Eye-Controlled Autofocus for
himself or herself under a different
calibration No.
CAL-2
During the calibration, do not squint or
wink your eye.
First look at the blinking focusing point,
then press the shutter button.
If you will use the camera while wearing
eyeglasses or contact lenses, calibrate
while wearing your eyeglasses or contact
lenses.
The eyecup must be attached to the
viewfinder eyepiece.
During the calibration, the sun must not
shine directly on your eye.
When outdoors, do not allow the sun to
shine on your eye.
Your hair must not cover your eye.
Your eyeglasses should not slip down your
nose and be positioned differently.
Calibration may not be possible with
mirror-type sunglasses.
If Eye-Controlled Autofocus does not function even after following the
guidelines above, select the focusing point with the focusing point
44 selector and Main Dial.