Nikon S9400 - S9500 - Manual (Page 195)

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The Setup Menu
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AF Assist
Enable or disable the AF-assist illuminator that assists the autofocus when the
lighting is dim.
Press the d button M z menu icon (A6) M AF assist
Option Description
Auto (default setting)
AF-assist illuminator lights automatically if the lighting is dim.
The illuminator has a range of about 5.0 m (16 ft) at the
maximum wide-angle position and about 5.0 m (16 ft) at the
maximum telephoto position.
• For some focus areas and scene modes such as Museum
( A40) and Pet portrait (A42), AF-assist illuminator does
not turn on even if Auto is set.
Off
AF-assist illuminator does not light. The camera may be unable
to focus if lighting is dim.