Assertion: slr camera | /r/HasProperty | equipped with eye-controlled focusing
Facets:
value: through the tracking of eyeball movements
type: MANNER
Source sentences:
text: Through the tracking of eyeball movements, EOS cameras equipped with eye-controlled focusing (ECF) (some identifiable by the suffix E) were able to select the desired autofocus point in the scene, based on where the user was looking in the viewfinder frame.