Assertion: camera's aperture | /r/HasProperty | f-number
Facets:
Source sentences:
text: N is the relative aperture (f-number)
text: Equivalent aperture is the f-number adjusted to correspond to the f-number of the same size absolute aperture diameter on a lens with a 35mm equivalent focal length.
text: A the relative aperture (f-number)
text: the relative aperture (f-number)