The Nikon TC-17E II AF-S Teleconverter is compact and lightweight, and features a powerful 1.7x magnification factor and 1.5 stop exposure compensation for the AF-S, the AF-I and Nikon VR telephoto lenses. Teleconverters are an affordable way for photographers looking to expand their reach and are ideal for sports, wildlife and more. Nikon integrated coating (IC) enhances light transmission efficiency, improves colour consistency and reduces flare.