Nikon VQA060AA Reference Manual page 105

Movie Frame
Press the s button to display the movie frame (A8). Check the range of a
movie in the frame before movie recording.
The area that is recorded in a movie varies depending on the settings of Movie
options, Electronic VR, etc. in the movie menu.
Focusing
The focus can be adjusted during movie recording in the following manner in
accordance with the Autofocus mode (A153) setting of the movie menu.
- A Single AF (default setting): The focus is locked when movie recording
starts. To perform the autofocus function during movie recording, press the
multi selector J.
- B Full-time AF: The focus is adjusted repeatedly even during movie
recording. The button that locks the focus depends on the setting for AE/AF
lock button (A175) in the setup menu. When AE/AF lock or AF lock only is
selected, press the o (AE-L/AF-L) button (A5) during movie recording to lock
the focus. To unlock, press the o button again. When AE lock only or AE lock
(Hold) is selected, press the multi selector J during movie recording to lock
the focus. To unlock, press J again.
When the focus-mode selector is set to r (manual focus), you can adjust the focus
manually while recording movies by rotating the multi selector or control ring.
Exposure
The button that locks the exposure depends on the setting for AE/AF lock button
(A175) in the setup menu. When AE/AF lock, AE lock only, or AE lock (Hold) is
selected, press the o (AE-L/AF-L) button (A5) during movie recording to lock the
exposure. To unlock, press the o button again. When AF lock only is selected, press the
multi selector K during movie recording to lock the exposure. To unlock, press K again.
Maximum Movie Recording Time
Individual movie files cannot exceed 29 minutes in length, even when there is
sufficient free space on the memory card for longer recording. The maximum file size
for individual movie files is 4 GB. When recording a movie longer than approximately
six minutes at an image size/frame rate of 2160/30p (4K UHD) or longer than
approximately seven minutes at an image size/frame rate of 2160/25p (4K UHD),
multiple files are created when the file size of the recorded movie exceeds 4 GB, and
the files cannot be played back continuously (A150).
The remaining recording time for a single movie is displayed on the shooting
screen.
Recording may end before either limit is reached if camera temperature becomes
elevated.
The actual remaining recording time may vary depending on the movie content,
subject movement, or type of memory card.
Movies
Basic Operations of Movie Recording and Movie Playback
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