Dolly Shot..
The camera may move along with a character and capture what the character sees.Such type of shot is generally called a dolly shot.A trolley which carries the camera and moves forward while the shot is on can be used for dolly shot. For instance a character sees an object near the beach and walk towards it.The camera vision is what the character sees and the camera also walk forwards along with the character for this (the character wil not be shown here;the focus will be on the object lying at the beach;same as what the character is looking).Finally when the character reaches near the object, we may identify it as a dead body. It need be necessarily as the character moves; the character need not be there also.In our example, if the character is not there, the camera moves from position towards the deadbody.Its like the audience walking towards the dead body.
Official definition:
dolly (shot) :
refers to a moving shot in which the perspective of the subject and background is changed; the shot is taken from a camera that is mounted on a hydraulically-powered wheeled camera platform (sometimes referred to as a truck or dolly), pushed on rails (special tracks) and moved smoothly and noiselessly during filming while the camera is running;a pull-back shot (or dolly out) is the moving back ('tracking back') of the camera from a scene to reveal a character or object that was previously out of the frame, dolly in is when the camera moves closer ('tracking in') towards the subject, and dollying along with (or 'tracking within') refers to the camera moving beside the subject; also known as tracking shot, trucking shot, follow shot, or traveling shot; contrast with zoom shots.
Examples: the first eight minutes of Robert Altman's The Player (1992) was filmed with a sustained dolly shot, similar to the famous opening sequence of Welles' Touch of Evil (1958 ); or the opening shot in Boogie Nights (1997) that tracked into the 70s disco, or the shot from the dressing room to the ring in Raging Bull (1980)
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