Tamron SP 70-200mm f/2.8 Di VC USD Zoom Lens for Canon Digital Cameras Tamron Lens, 70-200mm Tamron f/2.8 Di VC USD Zoom Lens for Canon Notable Features: 70-200mm Telephoto Zoom Lens, Aperture Range: f/2.8-32, Ultrasonic Silent Drive Motor A rotatable, removable tripod collar comes with this lens and allows for stable, balanced tripod mounting, and a matched petal-type lens hood is also included USD (Ultrasonic Silent Drive) Motor is the power for a fast and quiet autofocus drive that works in harmony with continuous manual focus mechanism Tamron's advanced multi-layer coating technology dramatically improves lens performance by reducing flare and ghosting for crisper, clearer images