Compose photographs with off-center subjects.
Focus: 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).
Recompose: Keep the shutter button pressed halfway.
Shoot: Press the button all the way down.
Focus lock using the shutter button is only available when ON is selected for BUTTON/DIAL SETTING > SHUTTER AF, SHUTTER AE.
At default settings, you can use the AE-L button to lock exposure without locking focus. If the AF-ON button is assigned AF LOCK ONLY (FUNCTION (Fn) SETTING, The Fn (Function) Buttons), it can similarly be used to lock focus without locking exposure.
The controls used for AE LOCK ONLY, AF LOCK ONLY, and AE/AF LOCK can be chosen using BUTTON/DIAL SETTING > FUNCTION (Fn) SETTING (FUNCTION (Fn) SETTING, The Fn (Function) Buttons). 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 BUTTON/DIAL SETTING > AE/AF-LOCK MODE, the lock can only be ended by pressing the control a second time.