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In photography and cinematography, perspective distortion is a warping or transformation of an object and its surrounding area that differs significantly from what the object would look like with a normal focal length, due to the relative scale of nearby and distant features.
In photography, a perspective-control lens allows the photographer to control the appearance of perspective in the image; the lens can be moved parallel to the film or sensor, providing the equivalent of corresponding view camera movements. This movement of the lens allows adjusting the position of the subject in the image area without moving ...
Perspective distortion (photography), the way that viewing a picture from the wrong position gives a perceived distortion; Perspective (geometry), a relation between geometric figures; Vue d'optique or perspective view, a genre of etching popular during the second half of the 18th century and into the 19th.
Picture of Notre Dame de Reims showing perspective distortion The same picture corrected. Perspective control is a procedure for composing or editing photographs to better conform with the commonly accepted distortions in constructed perspective. The control would: make all lines that are vertical in reality vertical in the image.
Perspective distortion – An optical technique where lenses of different focal lengths are used to affect the perceived distance between the foreground and background. Wider lenses extend the distance and show more of the background, which can be used to reveal a detailed view of the subject and its immediate surroundings in the same frame.
Nikon 24mm perspective control lens. A tenet of architectural photography is the use of perspective control, with an emphasis on vertical lines that are non-converging (parallel). This is achieved by positioning the focal plane of the camera at so that it is perpendicular to the ground, regardless of the elevation of the camera eye.
The anamorphic distortion of the source image crucial to the illusion can be understood by likening the images to projections of a 3D object onto a plane (e.g. a sheet of paper) originating from the location of the viewer's eyes. The base of the object meets the plane where the object stands, while the tip of the object is "projected" to a more ...
Thus, during the zoom, there is a continuous perspective distortion, the most directly noticeable feature being that the background appears to change size relative to the subject. Hence, the dolly zoom effect can be broken down into three main components: the moving direction of the camera, the dolly speed, and the camera lens' focal length.