![]() ![]() The lens bends the angle of the shot to take a larger radius of the selected subject. These models are used with a fisheye lens. Various techniques can be used to generate 360-degree images. In the case that they cover the full sphere, the captured light rays do not intersect exactly in a single focal point. In practice, however, most omnidirectional cameras cover only almost the full sphere and many cameras which are referred to as omnidirectional cover only approximately a hemisphere, or the full 360° along the equator of the sphere but excluding the top and bottom of the sphere. ![]() In contrast, an ideal omnidirectional camera captures light from all directions falling onto the focal point, covering a full sphere. This means that it captures, at most, light falling onto the camera focal point through a hemisphere. A camera normally has a field of view that ranges from a few degrees to, at most, 180°.
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