Assertion: aperture | /r/HasProperty | expressed as f-stop
Facets:
value: in photography
type: LOCATION
value: usually
type: DEGREE
Source sentences:
text: Aperture is expressed as F-stop, e.g. F2.8 or f/2.8.
text: In photography, aperture is expressed in F numbers or f-stops.
text: Aperture is expressed as F-stop, e.g. F2.8 or f/2.8.
text: In photography, the aperture is usually expressed as an f-number (or f-stop) which is the ratio of focal length to effective aperture diameter.