Assertion: lens's field | /r/HasProperty | natural
Facets:
value: to humans
type: TRANSITIVE-OBJECT
value: to a human observer
type: TRANSITIVE-OBJECT
Source sentences:
text: In photography and cinematography, a normal lens is a lens that reproduces a field of view that appears "natural" to a human observer.
text: A ‘normal lens’ (has a field of view that appears ‘natural’ to humans) on a 35mm film camera has a focal length of 50mm.