Nikon Teleconverters, renowned for extraordinary performance, extend the versatility of NIKKOR Super Telephotos and other select NIKKOR lenses. The new 2x AF-S TC-20E III joins the 1.4x AF-S TC-14E II and 1.7x AF-S TC-17E II, offering photographers effective solutions for demanding assignments. The AF-S TC-20E III is the world?s first Teleconverter to feature an aspherical lens that, along with a new optical formula, raises performance to meet the increased imaging demands of FX-format D-SLRs.