Assertion: lens's aperture | /r/HasProperty | selected
Facets:
Source sentences:
text: Usually, you’ll select the aperture you want to use on your camera, but some lenses feature a ring which will let you manually select what aperture will be selected.
text: As the shutter button was depressed the lens would firstly be stopped down to the selected aperture, then the meter would be switched on and a reading taken.