Close-up ring extension tube for macro photography Material: Metal, not plastic or standard alloy Includes three extension tubes (9mm, 16mm, 30mm) Multiple combinations of the tubes allow adjustable magnification and focus distance No optical components inside the tubes, so image quality is not degraded Enables macro photography using the lenss original optical performance Compatible with F-mount lenses Designed for use with Nikon DSLR camera bodies Compatible models: D3X, D3, D700, D300 D90, D80, D60, D50, D40, D40x D70, D70s D100, D200 D2Xs, D2X, D2Hs D1, D1H, D1X No electronic contacts manual focus only Magnification varies depending on the lens used Set includes: 1 extension tube set (three pieces) Note: Lighting and display differences may cause slight color variation between the image and the actual item. Measurement error allowed: +/-1-3 cm