Sony Cyber-shot RX10 III - Manual (Page 98)

Depending on the circumstances, you cannot use [Eye AF], such as when [Focus Mode]
is set to [Manual Focus], etc.
[Eye AF] may not function 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.
[82] How to Use Using shooting functions Adjusting the focus
Focus Hold
Locks the focus while the key to which the Focus Hold function has been assigned is
pressed.
1. MENU
→
(Custom Settings
)→[Custom Key(Shoot.)]→assign the [Focus Hold]
function to the key of your choice.
2. Focus and press the key to which the [Focus Hold] function has been assigned.
3. Press the shutter button while holding down the key.
[83] How to Use Using shooting functions Adjusting the focus
Measuring the exact distance to the subject
The mark shows the location of the image sensor*. When you measure the exact
distance between the product and the subject, refer to the position of the horizontal line.
*
The image sensor is the part that converts the light source to a digital signal.