Nikon D800E User Manual - Page 122

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 91), you can also focus on another subject at the same distance and then use focus lock to recompose the photograph. Focus lock is most effective when an option other than auto-area AF is selected for AF-area mode (0 93). 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. N 2 Lock focus. AF-C focus mode (0 91): With the shutter-release button pressed halfway (q), press the A 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 A AE-L/AF-L button is pressed, even if you later remove your finger from the shutter-release button. Shutter-release button A AE-L/AF-L button AF-S focus mode: Focus locks automatically when the in-focus indicator appears, and remain locked until you remove your finger from the shutterrelease button. Focus can also be locked by pressing the A AEL/AF-L button (see above). 98