Nikon COOLPIX A900 Reference Manual - Page 99

Focus Lock If the camera is unable to focus using autofocus (0 75), use focus lock to recompose the photograph after focusing on another object at the same distance as your original subject. 1 Focus. Position the subject in the selected focus area and press the shutter-release button halfway to initiate focus. Check that the focus area is displayed in green. Focus will lock while the shutter-release button is pressed halfway. 2 Recompose the photograph and shoot. Do not change the distance between the camera and the subject while focus lock is in effect. If the subject moves, N focus again at the new distance. A The f Button Focus lock can also be assigned to the f button (0 193), in which case focus can be kept locked between shots by keeping the f button pressed. 79