Blurry Image

An example of an image showing camera shake

This close-up image of fireworks shows shaky light trails where the camera moved during the exposure. This is a classic example of camera shake. In this particular case, the camera shake was caused by unstable support during a several second exposure. The image was taken at a baseball game where it was not possible to take a sturdy tripod so the camera was supported on a camera bag in the photographer's lap.

In order to correct the camera shake in this case, more stable support would have prevented the blurry image. A possible solution under these circumstances would have been place the camera bag on a non-moving surface (such as the floor).

An example of an image showing blur due to slow shutter speed

This football image shows blur due to use of a slow shutter speed. In this case, the shutter speed was fast enough to allow the camera to be hand held, but too slow for the subject. The blur of the field was caused by the photographer panning (moving with the subject) in an attempt to freeze the action at such a low shutter speed. While the panning motion did not completely stop the action, it did come close to freezing the action of the player running the ball.

Possible solutions for the blur on this image includeUsing a faster film speed to allow a higher shutter speed
Using a flash to add light to the situation
Using a tripod to allow a smoother panning motion
Using a larger aperture (smaller F-Stop) to allow a faster shutter speed

 The photographer relied on the autofocus feature and due to the subject's motion and the bright white color, the camera was unable to focus precisely in time. In this particular case, the aperture was also set too large so that the depth of field was too shallow.

A possible solution for this image would be to have used a small aperture (large DOF) and to have manually focused the camera. Also, the photographer should try to focus on the head of the subject in order to ensure the face/eye is in focus. When the face/eyes of a subject are in good focus it is easier to overlook minor defects in focus across the rest of the subject.

An example of a worst case blurry image

This image shows an illustration of just about everything going wrong at once. The subject was a moving wild turkey. The image is blurry becauseThe shutter speed was too slow for the subject's motion
The shutter speed was too slow to allow for the camera to be hand held
The focus was poor
The shutter speed was too slow for the subject's motion
The shutter speed was too slow to allow for the camera to be hand held
The focus was poor
In this case the photographer was faced with poor lighting (shaded forest just before sunset) and a quick subject. This made it very difficult to focus quickly and to achieve a fast enough shutter speed. In order to correct these problems the photographer should haveUsed a higher film speed
Manually focused
Used a smaller aperture to gain a larger DOF
Used a tripod or other camera support

Source : http://photography.about.com