Tamron AF 17-35mm f/2.8-4.0 Di LD SP Aspherical (IF) Ultra Wide Angle Zoom Lens for Canon Digital SLR Cameras (Discontinued by Manufacturer) LD glass for superb image quality Di technology meets digital SLR performance characteristics Includes front and rear lens cap and a lens case Fast maximum aperture of f/2.8 at the wide angle end Maximum magnification - 1 - 9.6