Nikon D3400 Triple Lens Parent's Kit Manual Do Proprietário

80 More on Photography

: With the shutter-release 

button pressed halfway (q), press the 
A (L) button (w) to lock focus. 
Focus will remain locked while the 
A (L) button is pressed, even if you 
later remove your finger from the 
shutter-release button.

: Focus locks 

automatically and remain locked until you remove your 
finger from the shutter-release button. Focus can also be 
locked by pressing the 

A (L) button (see above).

Recompose the photograph and shoot.
Focus will remain locked between shots if you 
keep the shutter-release button pressed halfway 
(AF-S) or keep the 

A (L) button pressed, allowing 

several photographs in succession to be taken at the same 
focus setting.

Do not change the distance between the camera and the 
subject while focus lock is in effect. If the subject moves, 
focus again at the new distance.

A (L) button