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The Nikon TC-20E AF-S Teleconverter III is a high-performance teleconverter that doubles the effective focal length of certain Nikkor lenses without increasing the closest focusing distance. It is the world's first teleconverter to incorporate an aspherical lens element and as a result produces images with outstanding resolution and contrast. The Nikon TC-20E AF-S Teleconverter III is both compact and lightweight, making it a cost-effective and practical solution for those times when it is not possible or desirable to carry an extra telephoto lens with you. 

Technical Info