Sigma 10mm f/2.8 EX DC HSM Fisheye Lens for Canon Digital SLR Cameras (OLD MODEL) Fisheye lens designed specifically for APS-C digital SLR cameras 13.5cm minimum focusing distance and 1:3.3 maximum magnification allows close up photography Equipped with HSM allowing full-time manual focus override Equisolid angle projection system is possible for art and scientific use