Using Focus Lock
Focus Lock allows you to focus on a subject that is not in the center of the picture, or to capture action shots more quickly by
1.Frame the subject for your picture, or a higher contrast or brighter object, within the focus brackets.
2.Press the Shutter button halfway down to lock the focus and exposure.
3.Continue to hold the Shutter button halfway down while you
4.Press the Shutter button all the way down to take the picture.
Optimizing Exposure
When you press the Shutter button halfway down to auto focus, the camera also measures the light level to set the proper exposure and displays the exposure settings (F- number and shutter speed) in the Image Display. If the camera determines the scene will require a very long exposure, 
(shaking hand icon) appears. The camera will take the picture, but it will likely be blurry. Try one of the following:
•Set the flash to Auto or Flash On (see page 47) to increase the lighting.
