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The PhotoNotes.org Dictionary of Film and Digital Photography.

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Tilt-shift lens (TS).

A lens capable of both tilt and shift movements.

Such lenses permit certain types of lens movements with respect to the body even if the camera does not have a lens separated from the body by a flexible bellows mechanism.

Tilt-shift lenses can be used to correct for the problem of converging verticals, for example. This is lens shifting or perspective control - see the section on perspective control for more details.

The lenses can also tilt, which lets you move the optical axis away from the perpendicular of the film plane. Normally the optical axis of a lens is precisely perpendicular (90°) from the film surface, but tilt lenses let you alter this angle, which is useful for altering what parts of an image are within the depth of field and are thus in focus.

cf. bellows, converging verticals, image area, image circle, movements, perspective control lens.

Entry last updated 2002-04-05. Term 1228 of 1487.


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