Assertion: lens's motor | /r/CapableOf | combine the benefits of a ring
Facets:
value: for smooth and quiet video autofocusing
type: PURPOSE
value: for high-speed af
type: PURPOSE
Source sentences:
text: IS II USM lens is the second Canon lens equipped with Nano USM technology, a focusing motor that combines the benefits of a ring USM (ultrasonic motor) for high-speed AF during still photo shooting and lead-screw type STM (stepping motor) for smooth and quiet video autofocusing (AF).