Canon EF 300mm f/4L IS USM Telephoto Fixed Lens for Canon SLR Cameras - 2530A004,Canon Support for EF 300mm f/4L IS USM | Canon U.S.A., Inc.,Canon EF 300mm F/4 IS USM Telephoto for sale online | eBay,Canon EF 300mm f/4 L IS USM Lens With Case 82966213380 | eBay,Canon EF 300mm f/4L IS USM Lens 2530A004 B&H Photo Video,