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Field of view

Extent of the observable world seen at any given moment / From Wikipedia, the free encyclopedia

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The field of view (FoV) is the extent of the observable world that is seen at any given moment. In the case of optical instruments or sensors it is a solid angle through which a detector is sensitive to electromagnetic radiation.

FOV both eyes
Vertical FOV
Angle of view can be measured horizontally, vertically, or diagonally.
A 360-degree panorama of the Milky Way at the Very Large Telescope. In the image, the Milky Way appears like an arc of stars spanning horizon to horizon with two streams of stars seemingly cascading down like waterfalls.[1]