Canon EOS-1D Mark IV - Manual (Page 133)

Using AF to Focus
Focus the subject.
• Press the shutter button halfway and
the camera will focus the face
covered by the <; > frame.
► When focus is achieved, the AF point
will turn green and the beeper will
sound.
► If focus Is not achieved, the AF point
will turn orange.
• If a face cannot be detected, the AF
point <□> will be displayed and AF
will be executed at the center.
Take the picture.
• Check the focus and exposure, then
press the shutter button completely to
take the picture (p.127).
If the focus is way off, face detection wili not be possibie. if the iens
enabies manuai focusing even whiie the iens focus mode switch is set to
<AF>,
turn the focusing ring to attain rough focus. The face wiil then be
detected and <' > wiii be dispiayed.
An object other than a human face might be detected as a face.
Face detection wiii not work if the face is very smaii or iarge in the
picture, too bright or too dark, titled horizontally or diagonally, or partially
hidden.
The <; > focusing frame might cover only part of the face.
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