Canon CINE-SERVO 50-1000mm T5.0-8.9 with EF Mount 0438C001 B&H
Amazon.com : ZoomSpeed Bundle for Canon EF 50mm f1.8 STM: (0570C002) Nifty Fifty EF 50 mm f/1.8 Stepper Motor Full Frame Prime Lens + ZoomSpeed Pro Starter Kit : Electronics
Canon 50 1000mm Cine Servo Lens At InterBee 2014 - YouTube