Nikon COOLPIX S810c Product Manual - Page 127

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 (0 107), 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 (0 100). 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 97): With the shutter-release button pressed halfway (q), press the center of the sub-selector (w) to lock Shutter-release button both focus and exposure (an AE-L icon will be displayed in the viewfinder). Focus will remain locked while the center of the sub-selector is pressed, even if you later remove your finger Center of sub-selector from the shutter-release button. 105