Canon EOS 5D MARK IV, Инструкция по эксплуатации

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Menu Function Settings
Cautions When [Movie Servo AF] is Set to [Enable]
Shooting Conditions that Make Focusing Difficult
• A fast-moving subject approaching or moving away from the camera.
• A subject moving at a close distance in front of the camera.
• With a higher f/number
• Also see “Shooting Conditions that Make Focusing Difficult” on page
324.
Since this drives the lens continuously, it will consume battery power and
shorten the movie shooting time (p.359).
With certain lenses, the mechanical sound of the lens for focusing may
be recorded. If this happens, you can use the Directional Stereo
Microphone DM-E1 (sold separately) to reduce the mechanical sound of
the lens to be recorded.
Movie Servo AF will pause during zooming or magnified view.
During movie shooting, if a subject approaches or moves away or if the
camera is moved vertically or horizontally (panning), the recorded movie
image may momentarily expand or contract (change in image
magnification).
If you want to set the lens’s focus mode switch to < MF > during Movie
Servo AF, first set the Live View shooting/Movie shooting switch to
<
A
>.