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. Uses Century's popular Bayonet Mount that attaches with a twist to the front of your lens. The lens attachment also features a front filter thread of 102mm. For use with the Sony HVR-Z1U and HDR-FX1.