The Century Optics .6X Wideangle HD Adapter Bayonet Mount is ideal for shooting situations in which zooming isn"t needed. The .6X attaches to the front of your video zoom lens for 40% wider angle of view and minimal distortion. The partial zoom adapter, allows zoom capability from wide angle to mid-range when using the camera in auto focus mode. It comes in the popular Bayonet Mount that attaches with a twist to the front of your lens.