In photography, angle of view describes the angular extent of a given scene that is imaged by a camera. It parallels, and may be used interchangeably with, the more general visual term field of view.
The angle of view of a camera is a function of three parameters:
1. The dimensions of the film format or image sensor;
2. The focal length of the photographic lens projecting the image; and
3. The kind and degree of distortion of the lens.
It follows that for lenses projecting rectilinear (non-spatially-distorted) images, the film format or image sensor dimensions completely define the angle of view for any given lens focal length.
Angle of view is usually measured one of three ways:
* horizontally (from the left to right edge of the frame)
* vertically (from the top to bottom of the frame)
* diagonally (from one corner of the frame to its opposite corner)
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