Brand VILTROX Quantity 1 piece(s) per pack Color Black Material Plastic + aluminium alloy Diameter 62mm Compatible Camera Models Canon EOS EF EF-S SLR and Lens Functions It moves the lens from the film or digital sensor. The closer the focus is the greater the magnification; The extension tube does not affect image quality as there is no optics inside; In comparison a close up filter is often blamed for degrading the quality of image; Auto-focus function can operate; This is used by attaching between camera body and lens of the 35mm single-lens reflex camera Other Features Tube Lengths: (1)12mm (2)20mm (3)36mm Packing List 1 x Auto focus macro extension tube set 1 x English and Chinese user manual