Assertion: aperture | /r/HasProperty | variable opening
Facets:
value: similarly
type: DEGREE
value: in the lens
type: LOCATION
Source sentences:
text: Similarly the Aperture is a variable opening in the lens surrounded by rounded blades, and these aperture blades are opened and closed either mechanically (in older manual lenses with the help of an aperture ring) or electronically with a dial (in modern automatic lenses mounted on a DSLR).