2X Teleconverter designed for use with AF-S and AF-I Nikkor lenses. Increases focal length by 100% - 2X. Reduces lens aperture by two f-stops. 7 elements in 6 group lens construction assures highest picture quality. Full aperture metering with compatible cameras Auto focusing possible, when used with D1, D1X, D1H, D100, D2H, F5, F100, N80, N75 and N65 AF SLR Cameras. Nikon Integrated Coating reduces flare and ghosting.