The Century Optics VS-07CV-XL2 is a 0.7x wide angle converter made to fit onto the Canon XL-2 standard 20x lens. The lens converter provides an 30% greater wideness than the lens alone provides. In Centrury Optics language a "converter" will render images without vignetting with complete zoom-through capability. This converter also will mount onto the XL-1/S standard servo 16x lens also.