lens shift

Definition: Mechanics in lens mounting that allows the lens to be moved sideways i.e. at right-angles to the optical axis. * This changes the field of view without change in perspective.
Let's get it in perspective
Lens shifts are used most often to reduce foreground coverage and increase what can be seen in the upper part of the image. This helps overcome converging parallels as the camera back can then be kept more parallel to the subject than otherwise. Unfortunately, a certain ignorant camera manufacturer dubbed their popular shfit lens 'Perspective Control', giving rise to the myth that such lenses change perspective. No lens can control perspective. Only your control perspective through your choice of position and way you orientate the camera.

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