Canon EF 75-300mm f/4-5.6 III Telephoto Zoom Lens. The optical system, construction, and exterior are the same as the EF 75-300 mm f/4-5.6 III USM's. The difference is that it uses a DC motor instead of a USM to drive the AF. So buy this and Get Free Shipping on a Canon EF 75-300mm f/4-5.6 III Telephoto Zoom Lens - f/4 to 5.6 for $116.95 after instant rebate at Rakuten.com, a $153.05 Savings!