Sigma 105mm F2.8 EX DG OS HSM Macro Lens for Canon SLR Camera Designed for use with full frame digital SLR cameras. May also be used with smaller APS-c size sensors with a corresponding effective increase in focal length to about 150mm with most cameras Focuses down to 1:1 magnification ratio at its closest working distance of 12.3 inches A hood adapter, lens hood, front & rear lens caps are included with the lens Filter size 62mm