Following the action
When there is a big action scene such as a car chase a camera on a tripod doesn't work so a camera needs to be able to move. There is different equipment used to film scenes like these. A dolly shot or tracking shot is when a cart is on a track and is then moved along it to record a shot. The camera is mounted on the cart to film all the footage. Most dollies also have have the ability to move vertically to capture footage that maybe high up or in some cases they can be fitted with cranes so footage at a higher level can be captured easily and successfully.
A Dolly Zoom is a technique that zooms in and out but adjusting the the zoom angle and ensuring the the subject in shot in the same size in the frame.A dolly zoom is an unnatural effect and creates something that your eyes wouldn't see. This effect was made famous by Alfred Hitchcock in the film Vertigo and was later used by Steven Spielberg in Jaws.
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