Solution
If you are using firmware version 1.1.0 or later, you can select [Mode 1] or [Mode 2] in [Movie Servo AF] to specify your preferred characteristics for AF operation.
Emphasizes fast, responsive focusing.
- Suitable for responsive subject tracking, or if you will walk or move in other ways while recording.
- Keeps subjects in focus, even when the shutter button is not pressed halfway.
Emphasizes natural focusing and smoothness in movie recording.
- Suitable for landscapes or relatively still subjects.
- Keeps subjects in focus, even when the shutter button is not pressed halfway.
REFERENCE
When you select [Disable], the focus remains constant as movies are recorded.