Nikon D3300 Product Manual - Page 96

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 83) or use focus lock (0 81) to focus on another subject at the same distance and then recompose the photograph. There is little or no contrast between The focus point contains areas of the subject and the background. sharply contrasting brightness. Example: Subject is the same color as the background. Example: Subject is half in the shade. The focus point contains objects at Background objects appear larger different distances from the camera. than the subject. Example: Subject is inside a cage. Example: A building is in the frame behind the subject. The subject is dominated by regular The subject contains many fine geometric patterns. details. Example: Blinds or a row of windows in a skyscraper. Example: A field of flowers or other subjects that are small or lack variation in brightness. 76 More on Photography