Nikon D5300 a3: Built-in AF-assistIlluminator Gbutton ➜ ACustom Settings menu, a4: Rangefinder

a3: Built-in AF-assist Illuminator Gbutton ➜ ACustom Settings menu

Choose whether the built-in AF-assist illuminator lights to assist AF-assist illuminator the focus operation when lighting is poor.

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

Gbutton ➜ ACustom Settings menu

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).

IndicatorDescription

Subject in focus.

Focus point is slightly in front of subject.

Focus point is well in front of subject.

IndicatorDescription

Focus point is slightly behind subject.

Focus point is well behind subject.

Camera can not determine correct focus.

AUsing 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.

ACustom Settings: Fine-Tuning Camera Settings 185