Sony ILCA-99M2 Manual page 71

predicting the position of the subject.
[38] Shooting Auto focus
Eye AF
The camera focuses on the subject's eyes while you keep the button pressed.
MENU →
1
assign the [Eye AF] function to the key.
Point the camera at a person's face, and press the button to which you have
2
assigned the [Eye AF] function.
Press the shutter button while pressing the button.
3
Hint
When the camera focuses on the eyes, a detection frame is displayed over the eyes. If the focus
mode is set to [Single-shot AF], the frame will disappear after a period of time.
Note
The camera may not be able to focus on the eyes depending on the circumstances, such as when no
eyes can be detected within the auto focus area. In such cases, the camera detects a face and
focuses on the face.
If the camera cannot detect a person's face, you cannot use [Eye AF].
Depending on the circumstances, you cannot use [Eye AF] such as when [Focus Mode] is set to
[Manual Focus].
The [Eye AF] function may not function very well in the following situations:
When the person is wearing sunglasses.
When the front hair covers the person's eyes.
In low-light or back-lit conditions.
When the eyes are closed.
When the person is in the shade.
When the person is out of focus.
When the person is moving too much.
If the person is moving too much, the detection frame may not display correctly over their eyes.
(Camera Settings2) → [Custom Key(Shoot.)] → desired key, then