Polaroid 58mm Filter Thread Lens, Macro Reverse Ring Camera Mount Adapter For The Nikon D40, D40x, D50, D60, D70, D80, D90, D100, D200, D300, D3, D3S, D700, D3000, D5000, D3100, D7000, D5100, D3200, D600, D4, D800, D800E Digital SLR Cameras Allows you to mount Nikon lenses in reverse for a macro extreme effect All metal construction Smooth Surface For Effortless Mount Extream Macro Closeup Results