Definition: (1) Optic with greater angle of view than that of a normal lens for a given format. (2) Optic with focal length significantly less than that of a normal lens for a given format. * NB: both this and the first definitions are functionally identical. * E.g. An optic of 40mm focal length has a 90< field of view on the 6x6cm format compared to the 52< of the normal 80mm lens. (3) Optic with greater angle of coverage than that usual in lenses for a given format e.g. optics designed to allow for shift or tilt movements must cover a greater area than the standard film format. (4) Projection lenses which project a larger image than normal for a given throw (distance between projector and screen).
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