Nikon 13187 User Guide (en)

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Focus Lock
Focus lock can be used to change the composition after focusing, 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 98), 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 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 
AE-L/AF-L 
button (w) to lock both focus and exposure (an 
AE-L icon will be displayed in the viewfinder). 
Focus will remain locked while the 
AE-L/AF-L 
button is pressed, even if you later remove your 
finger from the shutter-release button.
AF-S focus mode
: Focus locks automatically when 
the in-focus indicator appears, and remain 
locked until you remove your finger from the 
shutter-release button. Focus can also be locked 
by pressing the 
AE-L/AF-L button (see above).
3
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 
AE-L/AF-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
See Also
See Custom setting c1 (Shutter-release button AE-L
0 226) for information on using the 
shutter-release button to lock exposure, Custom Setting f4 (Assign AE-L/AF-L button
0 244) for information on choosing the role played by the A AE-L/AF-L button.
Shutter-release button
AE-L/AF-L button