A3: Built-In Af-Assist Illuminator; A4: Rangefinder - Nikon D5300 User Manual

a3: Built-in AF-assist Illuminator

Choose whether the built-in AF-assist illuminator lights to assist
the focus operation when lighting is poor.
Option
The AF-assist illuminator lights when lighting is poor (for more information, see
On
page 252).
The AF-assist illuminator does not light to assist the focus operation. The camera
Off
may not be able to focus using autofocus when lighting is poor.

a4: Rangefinder

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).
Indicator
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.
Description
Subject in focus.
Focus point is slightly in
front of subject.
Focus point is well in
front of subject.
A Custom Settings: Fine-Tuning Camera Settings
G button ➜ A Custom Settings menu
Description
G button ➜ A Custom Settings menu
Indicator
AF-assist illuminator
Description
Focus point is slightly
behind subject.
Focus point is well
behind subject.
Camera can not
determine correct
focus.
185