Nikon D3000 D3000 User's Manual - Page 60

3 Choose a focus mode. Highlight one of the following options and press J. 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. AF-S Single-servo AF For stationary subjects. Focus locks when shutter-release button is pressed halfway. AF-C Continuousservo AF For moving subjects. Camera focuses continuously while shutterrelease button is pressed halfway. MF Manual focus Focus manually (0 48). D Continuous-servo Autofocus z In AF-C mode or when continuous-servo autofocus is selected in AF-A mode, the camera gives priority to shutter response and the shutter may be released before the in-focus indicator is displayed. A Getting Good Results with Autofocus Autofocus does not perform well under the conditions listed below. The shutter release may be disabled if the camera is unable to focus under these conditions, or the in-focus indicator (I) may be displayed and the camera may sound a beep, allowing the shutter to be released even when the subject is not in focus. In these cases, focus manually (0 48) or use focus lock (0 46) to focus on another subject at the same distance and then recompose the photograph. There is little or no contrast between the subject and the background. The focus point contains areas of sharply contrasting brightness. Example: Subject is the same color as the background. The focus point contains objects at different distances from the camera. Example: Subject is inside a cage. The subject is dominated by regular geometric patterns. Example: A row of windows in a skyscraper. Example: Subject is half in the shade. Background objects appear larger than the subject. Example: a building is in the frame behind the subject. The subject contains many fine details. Example: A field of flowers or other subjects that are small or lack variation in brightness. 42