More on Amazon.com : http://www.amazon.com/gp/product/B004VNH18Q?tag=thefatkidin06-20 <br /> <br />Polaroid Auto Focus DG Macro Extension Tube Set (12mm 20mm 36mm) For Nikon Digital SLR Cameras <br /> <br />The Extension Tubes Enable Your Lens To Focus Closer Than Its Normal Minimum Focusing Distance Resulting In The Magnification Of The Subject <br />Includes Electrial Contacts To Maintain Auto Focus And Auto Exposure Capabilities <br />Tube Sizes 12mm 20mm 36mm
