Assertion: lens | /r/HasProperty | expressed by their effective apertures
Facets:
value: into extra rapid
type: OTHER
value: with apertures
type: OTHER
Source sentences:
text: For example, the 1911 Encyclopædia Britannica states that "...[Lenses] are also sometimes classified according to their rapidity, as expressed by their effective apertures, into extra rapid, with apertures larger than f/6; rapid, with apertures from f/6 to f/8; slow, with apertures less than f/11.