For anyone looking to step up their game in the DSLR/photography world, the CanonEF 16-35mm f/2.8L II USM lens is the perfect addition to your collection! This lens ranges from 16mm wide-angle to 35mm portrait-length telephoto; now that is what I call versatility! The lens is ultra-wide angle and water resistant! This lens also utilizes Canon's ring-type USM which gives you a silent but fast operation, giving you the best picture and video quality possible. SpecificationsFocal Length & Maximum Aperture - 16-35mm f/2.8.Lens Construction - 16 elements in 12 groups. Diagonal Angle of View 10810'-63.Focus Adjustment - AF with full-time manual. Closest Focusing Distance - 0.92 ft./0.28m.Filter Size - 82mm. Max. Diameter x Length, Weight - 3.5 in. x 4.4 in./88.5mm x 111.6mm, 640g.