Nikon D330018-55VR User Manual (en)

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More on Photography
Focus Lock
Focus lock can be used to change the composition after focusing 
in AF-AAF-S, and AF-C focus modes (
0 74), making it possible to 
focus on a subject that will not be in a focus point in the final 
composition. If the camera is unable to focus using autofocus 
(
0 76), focus lock can also be used to recompose the 
photograph after focusing on another object at the same 
distance as your original subject. Focus lock is most effective 
when an option other than 
e (Auto-area AF) is selected for AF-
area mode (
1
Focus.
Position the subject in the 
selected focus point and 
press the shutter-release 
button halfway to initiate 
focus. Check that the in-
focus indicator (
I) appears 
in the viewfinder.
2
Lock focus.
AF-A and AF-C focus modes
: 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.
Shutter-release button
A (L) button