Nikon D200 D200 User's Manual - Page 30

Tutorial-Basic Photography 4 Focus Press the shutter-release button halfway to focus. If the camera is able to focus on the subject in the center focus area, a beep will sound and the in-focus indicator (●) will appear in the viewfinder (if the focus indicator blinks, the camera was unable to focus using autofocus). Focus will lock while the shutter-release button is pressed halfway. If the subject is dark, the AF-assist illuminator may light to assist the focus operation. 5 Check exposure In exposure mode P (programmed auto), the camera automatically sets shutter speed and aperture when the shutter-release button is pressed halfway. Before shooting, check the shutterspeed and aperture indicators in the viewfinder. If the photo would be under- or over-exposed at current settings, one of the following indicators will be displayed. Indicator Description Photo will be overexposed. Use optional Neutral Density (ND) filter. Photo will be underexposed. Use flash or raise ISO sensitivity. The Shutter-Release Button The camera has a two stage shutter-release button. The camera focuses when the button is pressed halfway; focus locks until the button is released. To take the picture, press the shutter-release button the rest of the way down. Lock focus Take photograph 20