Blurred images are caused by several reasons: motion due to camera shake, use of slow shutter speeds and failure of the camera to focus correctly.
Digital cameras indicate when they achieve focus, either with a sound, a blinking LED or an on-screen indicator. To obtain focus, aim the camera at the subject and press the shutter-release button halfway down.
Make sure the camera locks before fully depressing the shutter button.
In some circumstances, especially low light, a digital camera may have trouble focusing. Auto focus modes work best when there is contrast between a subject and the background.
Move your camera around the subject to an area that has contrast. Keep trying until focus-lock is achieved.
Slow shutter speeds
When light is low, wide apertures and slow shutter speeds will be selected automatically by the camera. Most people can’t take blur-free, hand-held shots when the shutter speed is under 1/60th of a second.
Cameras that have optical Image Stabilization help but even IS has its limits. Increase room lighting, increase the ISO setting or use a tripod, or use a combination of all three.
Hold the camera steady
Even when shooting in bright light, you may move the camera without realizing it. To help reduce blurred photos, hold the camera steady, taking extra care as you frame the shot with the LCD. When using a viewfinder, press the camera firmly against your face to give it extra support.
Camera shake and telephoto zooms
Digital cameras are more prone to camera shake when taking hand-held shots and zooming in on a subject. To help prevent blur, shutter speed should be set faster than the focal length. For example, a lens set at 200mm (35mm equivalent) requires a shutter speed of at least 1/200 seconds.
Freeze the action
To help prevent blur when photographing a fast moving subject, select a fast shutter speed. A fast shutter speed “freezes” the action. If your digital camera doesn’t have the option to select shutter speeds, use the Sports or equivalent mode.
Blurred images or misfocus
If an image is blurred due to camera shake, the blur will appear throughout the entire image. If parts of an image are in focus, and others are not, you’ve misfocused.