Pentax OptioV20 - Manual (Page 4)

BE SPONTANEOUS.
YOU, AND YOU, AND YOU, AND UP TO 32.
Advanced Face Recognition.
In as little as 0.03 seconds, your Optio can detect and
focus on up to 32 faces in a photo frame. It can even
automatically shoot when your subject smiles, or warn
you when they blink. Did someone say “cheese?”
Number of faces varies by camera. Blink Detection and Smile Capture
may not be available on all models.