Pentax X90 Operating Manual page 73

• Face Detection AF and AE may not work if the subject is wearing
sunglasses, has part of their face covered or is not looking toward the
camera.
• If the camera cannot detect the subject's face, the camera focuses
using the setting currently selected in [Focusing Area].
• When the Smile Capture function is set, the shutter may not be
released automatically because the Smile Capture function may not
work in some situations, such as when the detected face is too small.
If this happens, press the shutter release button to release the shutter.
To Switch the Face Detection Function
By default, the Face Detection function is set to Face Detection On. You
can switch to the Smile Capture function, which automatically releases
the shutter when your subject smiles. The Face Detection function is
switched as follows each time the I button is pressed:
Smile Capture →
An icon indicating either Face Detection On or Smile Capture appears
on the display.
Face Detection On
Face Detection Off
Smile Capture
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→ Face Detection On
I button
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Face Detection Off
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