Assertion: lens's angle | /r/HasProperty | close
Facets:
value: in fisheye lenses
type: OTHER
Source sentences:
text: A normal lens typically has an angle of view that is close to one radian (~57.296˚) of the optical system's image circle.[citation needed]
text: In fisheye lenses, the visual angle is close to or more than 180 degrees in at least one direction.