Nikon S5100 - Manual (Page 117)

105
Recording Movies
M
o
vie
Rec
o
rdi
n
g
and Playback
Autofocus Mode
Select how the camera focuses in movie mode.
Switch to shooting mode M d M D (Movie menu) (A 103) M Autofocus mode
Option Description
A Single AF
(default setting)
Focus is locked when the
b (movie-record) button is pressed
to start recording.
Select this option when the distance between the camera
and the subject will remain fairly consistent.
B Full-time AF
Camera focuses continuously.
Select this option when the distance between the camera
and subject will change significantly during recording.
Use of
Single AF is recommended to prevent the sound of
the camera focusing from interfering with recording.