The Sigma 50mm f/2.8 EX DG Macro Lens for Nikon SLR Cameras is speciallydesigned for macro-photography enthusiasts. The special digital opticalcoating reduces reflections from the sensors and offers perfect colourbalance for clear shots. Offering a close working distance of 7.4inches and magnification ratio of 1:1, this camera autofocus lenscan take brilliant close-up shots of distant objects. It can alsobe attached to smaller APS-c size sensors to increase the focal lengthto about 85mm. Featuring a