The Canon HJ21x7.5B KLL-SC is a high definition electronic cinema lens with 21x zoom, built for 2/3" CCD cameras. The lens is machined to the rigorous standards of professional cinematographers making it ideal for commercials, dramatic television, and motion pictures. The HJ21x7.5B KLL-SC has the longest focal length of any cine zoom offered by Canon and weighs less than 5 pounds, making it highly portable.