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Change the FocalLength of the lens during a shot. Looks like, but not exactly like, a {{dolly}}.

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Change the FocalLength UsefulNotes/FocalLength of the lens during a shot. Looks like, but not exactly like, a {{dolly}}.


Combine it with a simultaneous {{Dolly}} for the VertigoEffect.

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Combine it with a simultaneous {{Dolly}} for the VertigoEffect. Compare the StaggeredZoom, when the zoom is accomplished with a series of cuts rather than continually changing the focal length, producing a much more startling effect.


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The zoom, or variable focal length, lens was a huge step forward. With the addition of a variable speed motor drive for the zoom, you can even adjust it ''during'' a shot with a single finger. Not only that, but any focal length within the designed range of the lens was possible. Thus one lens replaces a potentially infinite number of others[[note]]Digital cameras with (non interchangeable) zooms so powerful that you can have in one package from a wide angle to a respectable telephoto are now common. However that versatility comes at the cost of not only from what is commented below but also of a loss of image quality, because of the unavoidable compromises when designing that kind of lenses[[/note]].

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The zoom, or variable focal length, lens was a huge step forward. With the addition of a variable speed motor drive for the zoom, you can even adjust it ''during'' a shot with a single finger. Not only that, but any focal length within the designed range of the lens was possible. Thus one lens replaces a potentially infinite number of others[[note]]Digital others.[[note]]Digital cameras with (non interchangeable) (non-interchangeable) zooms so powerful that you can have in one package from a wide angle to a respectable telephoto are now common. However that versatility comes at the cost of not only from what is commented below but also of a loss of image quality, because of the unavoidable compromises when designing that kind of lenses[[/note]].
lenses.[[/note]]


The zoom, or variable focal length, lens was a huge step forward. With the addition of a variable speed motor drive for the zoom, you can even adjust it ''during'' a shot with a single finger. Not only that, but any focal length within the designed range of the lens was possible. Thus one lens replaces a potentially infinite number of others.

to:

The zoom, or variable focal length, lens was a huge step forward. With the addition of a variable speed motor drive for the zoom, you can even adjust it ''during'' a shot with a single finger. Not only that, but any focal length within the designed range of the lens was possible. Thus one lens replaces a potentially infinite number of others.
others[[note]]Digital cameras with (non interchangeable) zooms so powerful that you can have in one package from a wide angle to a respectable telephoto are now common. However that versatility comes at the cost of not only from what is commented below but also of a loss of image quality, because of the unavoidable compromises when designing that kind of lenses[[/note]].


Consider also the Zoom EstablishingShot, where a camera starts off showing a building (and the sign in front telling you what the building is) and then tilts, pans and zooms in on a window to indicate that the next shot you see is ''totally'' taking place in that room, and not on a set on a soundstage in a completely different city. Popular in the Seventies, it became something of a DeadHorseTrope once anyone with home video gear could do it (usually, it must be said, badly).

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Consider also the Zoom EstablishingShot, where a camera starts off showing a building (and the sign in front telling you what the building is) and then tilts, pans and zooms in on a window to indicate that the next shot you see is ''totally'' taking place in that room, and not on a set on a soundstage in a completely different city. Popular in the Seventies, it became something of a DeadHorseTrope once anyone with home video gear could do it (usually, it must be said, badly).
it.


Cinematographers, the kind that shoot on actual film, don't like the zoom lens. The increased amount of glass the light must pass through in order to reach the film causes distortion and increases the chance for LensFlare and other forms of glare. Also, the extensive planning that goes into each shot limits the need for on-the-fly focal length adjustments. The tube/CCD in a video camera has less resolution and contrast sensitivity than film, and thus is less vulnerable to these complaints.

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Cinematographers, the kind that shoot on actual film, don't like the zoom lens. The increased amount of glass the light must pass through in order to reach the film causes distortion and increases the chance for LensFlare and other forms of glare. Also, the extensive planning that goes into each shot limits the need for on-the-fly focal length adjustments. The tube/CCD in a video camera has less resolution and contrast sensitivity than film, and thus is less vulnerable to these complaints.
complaints, but over-use of zoom (particularly if the zoomed shot is not in focus, or if the zoom is jerky rather than smooth) is now fairly firmly ingrained in Western audiences as visual shorthand for "amateurish".

Consider also the Zoom EstablishingShot, where a camera starts off showing a building (and the sign in front telling you what the building is) and then tilts, pans and zooms in on a window to indicate that the next shot you see is ''totally'' taking place in that room, and not on a set on a soundstage in a completely different city. Popular in the Seventies, it became something of a DeadHorseTrope once anyone with home video gear could do it (usually, it must be said, badly).

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