The Nikkor TC-20E II is a small and compact teleconverter, suitable for photographing sports events, wildlife, surveillance, and much more. Built with a 2x optical conversion factor, this Nikon teleconverter doubles the focal length of the attached Nikkor lenses, thus enlarging the middle portion of the image taken. The Nikon Integrated Coating (IC) of this Nikon camera lens boosts the light transmission, for optimum color reproduction and minimized flaring effect. Engineered with 7 elements / 6 groups lens construction, this Nikon teleconverter promises to deliver optimum performance, always. Integrated with an AF-S Silent Wave Motor, this Nikon camera lens renders amazingly smooth, quiet and accurate AF operation. Weighing just 12.5 oz, the Nikkor TC-20E II is lightweight, enabling easy portability during outdoor photography.