Panasonic Lumix S5 Mirrorless Camera - Manual (Page 258)

10. Recording Videos
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[AF Custom Setting(Video)]
You can fine-adjust the focusing method for video recording using
[Continuous AF].
¨ [ ] ¨ [ ] ¨ Select [AF Custom Setting(Video)]
[ON] Enables the following settings.
[OFF] Disables the following settings.
[SET]
[AF Speed]
[ r ] side : Focus moves at a faster speed.
[ s ] side : Focus moves at a slower speed.
[AF Sensitivity]
[ r ] side : When the distance to the subject changes
significantly, the camera immediately readjusts the
focus.
[ s ] side : When the distance to the subject changes
significantly, the camera waits for a little before
readjusting the focus.