When the camera focuses automatically on what it sees
Auto focus
Calibrate
Rack focus
Focus
Selective focus
Manual focus
Using a twist grip similar to a motorcycle throttle to focus
Auto focus
Calibrate
Rack focus
Focus
Selective focus
Manual focus
Focusing on an object while leaving its foreground/background out of focus
Auto focus
Calibrate
Rack focus
Focus
Selective focus
Manual focus
To change the focus from a close object to one farther away and vice versa
Auto focus
Calibrate
Rack focus
Focus
Selective focus
Manual focus
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