Sony ILCE-7 How To Use Manual page 111

Automatically detects and shoots a smile.
Face Detection frame
When the product detects a face, the gray face detection frame appears. When the product
determines that autofocus is enabled, the face detection frame turns white. When you press
the shutter button halfway down, the frame turns green.
When the product detects two or more faces, it selects the face to be adjusted with higher
priority and the face detection frame over that face turns white. The face detection frames of
other registered faces will turn reddish-purple.
Tips for capturing smiles more effectively
Do not cover the eyes with front hair and keep the eyes narrowed.
Do not obscure the face by a hat, masks, sunglasses, etc.
Try to orient the face in front of the product and be as level as possible.
Give a clear smile with an open mouth. The smile is easier to be detected when the teeth are
shown.
If you press the shutter button during Smile Shutter, the product shoots the image. After
shooting, the product returns to Smile Shutter mode.
Hint
When the [Smile/Face Detect.] is set to [Smile Shutter], you can select the Smile Detection
Sensitivity from [On: Slight Smile], [On: Normal Smile] and [On: Big Smile].
Note
You cannot use [Face Detection] with the following functions:
When using zoom functions other than the optical zoom
Up to eight faces of your subjects can be detected.
The product may not detect faces at all or may accidentally detect other objects as faces in
some conditions.
If the product cannot detect a face, set the Smile Detection Sensitivity.
If you track a face using [Lock-on AF] while executing [Smile Shutter], Smile Detection is
performed only for that face.