Nikon Z 50 Reference Manual page 87

D
Face/Eye-Detection AF
• Eye detection is not available in movie mode.
• Eyes or faces may not be detected as expected if:
- the subject's face occupies a very large or very small proportion of
the frame,
- the subject's face is lit too brightly or too poorly,
- the subject is wearing glasses or sunglasses,
- the subject's face or eyes are obscured by hair or other objects, or
- the subject moves excessively during shooting.
59
Basic Settings