Nikon D3400 Kit Owner's Manual

30

: Press 

the shutter-release button 
halfway to focus (if the 
subject is poorly lit, the flash 
may pop up and the AF-
assist illuminator may light). 
When the focus operation is complete, a beep will sound (a 
beep may not sound if the subject is moving) and the in-focus 
indicator (

I) will appear in the viewfinder.

: The focus point flashes green 

while the camera focuses. If the 
camera is able to focus, the focus 
point will be displayed in green; 
otherwise, the focus point will flash 
red.

I

Subject in focus.

I 

(flashes)

Camera unable to focus using autofocus. See 
page 91.