Compose photographs with off-center subjects.
Position the subject in the focus frame and press the shutter button halfway to lock focus and exposure. Focus and exposure will remain locked while the shutter button is pressed halfway (AF/AE lock).
Press the button all the way down.
Focus lock using the shutter button is only available when [ON] is selected for D[BUTTON/DIAL SETTING] > [SHUTTER AF], [SHUTTER AE].
The AF-L and AE-L Buttons
Focus and exposure can also be locked with the [AF-L] and [AE-L] buttons. At default settings, the [AF-L] button locks focus, the [AE-L] button exposure.
While the assigned control is pressed, pressing the shutter button halfway will not end the lock.
If [AE&AF ON/OFF SWITCH] is selected for D[BUTTON/DIAL SETTING] > [AE/AF-LOCK MODE], the lock can only be ended by pressing the control a second time.
The controls used for [AE LOCK ONLY], [AF LOCK ONLY], and [AE/AF LOCK] can be chosen using D[BUTTON/DIAL SETTING] > [FUNCTION (Fn) SETTING] (a[FUNCTION (Fn) SETTING], The [Fn] (Function) Buttons).