Century's 7X HD Wide Angle Converter attaches quickly to the front of your lens, offering a 30% wider angle of view and full zoom-thru capabilities. The .7X HD shifts the focal length range from 4.5–54mm to 3.1-37.8mm — with no appreciable light loss. Specially designed for HD applications with multi-layer coated glass elements. Comes in our popular Bayonet Mount that attaches with a twist to the front of your lens.