Nikon D3400 Triple Lens Parent's Kit Owner's Manual

113

Use autoexposure lock to recompose photographs after using 
M (Center-weighted metering) and N (Spot metering) to 
meter exposure; note that autoexposure lock is not available in 
i or j mode.

Lock exposure.
Position the subject in the selected 
focus point and press the shutter-
release button halfway. With the 
shutter-release button pressed 
halfway and the subject positioned in 
the focus point, press the 

A (L) 

button to lock exposure.

While exposure lock is in effect, an AE-L 
indicator will appear in the viewfinder 
and the monitor.

A (L) button