Nikon D3s Body Only D3S User's Manual - Page 80
Framing Photographs in the Monitor
UPC - 018208254668
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Framing Photographs in the Monitor Press the a button to frame pictures in the monitor. The following options are available: • Tripod (h): Choose when the camera is mounted on a tripod (0 55). You can zoom in on the image displayed in the monitor for precise focus, making this option suitable for static subjects. x Contrast-detect autofocus can be used to compose photographs with the subject positioned anywhere in the frame. • Hand-held (g): Choose when taking hand-held shots of moving subjects, or when framing photographs at angles that make it difficult to use the viewfinder (0 59). Camera focuses normally using phase-detection autofocus. A Phase-Detection Versus Contrast-Detect AF The camera normally uses phase-detection autofocus, in which focus is adjusted based on data from a special focusing sensor. When Tripod is selected in live view, however, the camera uses contrast-detect autofocus, in which the camera analyses the data from the image sensor and adjusts focus to produce the greatest contrast. Contrast-detect autofocus takes longer than phase-detection autofocus. A Flicker You may notice flicker or banding in the monitor during live view or when shooting movies under certain types of lighting, such as fluorescent or mercury-vapor lamps. Flicker and banding can be reduced by choosing a Flicker reduction option that matches the frequency of the local AC power supply (0 330). 54