Nikon D5300 - Manual (Page 205)

185 A Custom Settings: Fine-Tuning Camera Settings
Choose whether the built-in AF-assist illuminator lights to assist
the focus operation when lighting is poor.
Choose On to use the exposure indicator to determine whether the camera is
correctly focused in manual focus mode (
0 57; note that this function is not available
in shooting mode M, when the exposure indicator instead shows whether the subject
is correctly exposed).
a3: Built-in AF-assist Illuminator
G button
➜ A Custom Settings menu
Option Description
On
The AF-assist illuminator lights when lighting is poor (for more information, see
page 252).
Off
The AF-assist illuminator does not light to assist the focus operation. The camera
may not be able to focus using autofocus when lighting is poor.
a4: Rangefinder G button
➜ A Custom Settings menu
Indicator Description Indicator Description
Subject in focus.
Focus point is slightly
behind subject.
Focus point is slightly in
front of subject. Focus point is well
behind subject.
Focus point is well in
front of subject.
Camera can not
determine correct
focus.
A
Using the Electronic Rangefinder
The electronic rangefinder requires a lens with a maximum aperture of f/5.6 or faster. The
desired results may not be achieved in situations in which the camera would be unable to
focus using autofocus (
0 52). The electronic rangefinder is not available during live view.
AF-assist illuminator