Sigma Macro 150mm f/2.8 EX DG HSM APO is an extremely sharp lens with minimal distortion and 1:1 magnification reproduction. This lens is a high-performance macro lens chassis for full frame cameras; however, it is compatible with cameras with smaller APS-C size senors. The superior designed lens employs Sigma's Hyper Sonic Motor (HSM) and Super Multi-Layer Coating. The designated HSM promises precise, fast and silent high speed AF system. The optical technology corrects aberrations and the Super Multi-layer Coating reduces flare and ghosting. The lens concerts 16 elements in 12 groups with two SLD and EX glass elements, nine diaphragm blades, 16.4°-9.1° viewing angle, 0.38 meters close focusing distance and 72mm filter thread.