Reference Manual

258 Menu Guide > A Custom Settings
Choose On for more accurate focus under low-light conditions
when AF-S is selected for focus mode, but note that camera may
require more time to focus. This option takes effect only in photo
mode when a setting other than b is chosen with the mode dial.
While low-light AF is in effect, “Low-light” will appear in the
display and the display refresh rate may drop.
Choose whether the built-in AF-assist illuminator lights to assist
the focus operation in photo mode when lighting is poor.
a11: Low-Light AF
G button ➜ A (Custom Settings menu)
a12: Built-in AF-Assist Illuminator
G button ➜ A (Custom Settings menu)
Option Description
On The illuminator lights as required (AF-S focus mode only).
Off
The illuminator does not light to assist the focus operation.
The camera may not be able to focus when lighting is poor.
D The AF-Assist Illuminator
The AF-assist illuminator has a range of about 1–3 m (3 ft 4 in.–
9 ft 10 in.); when using the illuminator, remove the lens hood. Do not
obstruct the AF-assist illuminator while it is lit.