All of us had the experience of shooting photos just to find out they look blurry or too soft. In almost all cases the reason for that is camera movement. When the camera moves while the shutter is open the result is a soft or blurry photo. Usually camera movements are small and for that reason in high shutter speeds the camera does not have an opportunity to move enough. However in some scenarios such as slow shutter speeds or high zoom values even the tiniest movement will result in a blurry photo.
Most photos are taken when the camera is held in your hand. The hand is an unstable platform and tends to move quite a bit. Moreover new digital cameras are smaller and lighter than ever before and are much harder to keep stable. Another cause for camera movement is aggressively pushing the shutter button which in return moves the camera. It is always better to squeeze the shutter button very slowly to prevent the camera from moving. Choosing the right camera for weight, grip and shutter button sensitivity is a recommended way to minimize camera movements in the future.
As a general rule photos that are taken with slow shutter speeds or high zoom values should be...