Nikon D5100 Reference Manual - Page 57

Focus This section describes the focus options available when photographs are framed in the viewfinder. Focus can be adjusted automatically or manually (see "Focus Mode," below). The user can also select the focus point for automatic or manual focus (0 45) or use focus lock to focus to recompose photographs after focusing (0 44). Focus Mode Choose from the following focus modes. Note that AF-S and AF-C are available only in modes P, S, A, and M. Option Description AF-A Auto-servo AF Camera automatically selects single-servo autofocus if subject is stationary, continuous-servo autofocus if subject is moving. Shutter can only be released if camera is able to focus. z AF-S Single-servo AF For stationary subjects. Focus locks when shutter-release button is pressed halfway. Shutter can only be released if camera is able to focus. For moving subjects. Camera focuses continuously while shutter- AF-C Continuousservo AF release button is pressed halfway. If subject moves, camera will engage predictive focus tracking to predict final distance to subject and adjust focus as necessary (0 40). At default settings, shutter can only be released if camera is able to focus (0 158). MF Manual focus Focus manually (0 45). 1 Place the cursor in the information display. If shooting information is not displayed in the monitor, press the P button. Press the P button again to place the cursor in the information display. Information display P button 2 Display focus-mode options. Highlight the current focus mode in the information display and press J. 39