Focus

A videographer should avoid using autofocus because it might not focus on the correct subject and if the subject in the frame is moving, then the videographer will have to readjust the focus.

Autofocus is acceptable when the lighting is good, the subject-camera distance is stable, and when there is little to no movement in the frame.

What are the 4 steps to properly set your focus manually when shooting a static subject?

1. Compose the shot. Make sure the camera is set to Manual Focus mode.
2. Zoom in as far as possible on the subject's eyes.
3. Adjust the focus control until the eyes are sharply in focus.
4. Zoom back out to compose the shot.

Rack focus is a popular technique that shooters use to rapidly shift the viewer's attention from one subject to another subject along the z-axis.