Assertion: lens's motor | /r/HasProperty | usm
Facets:
Source sentences:
text: All current L-series lenses have ultrasonic autofocus motors (USM) and extra communication pins, except for the specialist tilt-shift lenses which do not provide auto focus.
text: Other typical mechanical characteristics of L lenses (not exclusive to them nor present in all L lenses) are the use of an ultrasonic motor (USM) for focusing (particularly in recent years) and image stabilization (IS).