The Sigma 30mm f/1.4 EX DC HSM is a fast aperture standard lens for Canon digital SLR cameras. Special Low Dispersion and Extraordinary Low Dispersion glass elements are used to obtain the best possible correction for magnification and chromatic aberrations, which are particular problems for digital cameras. From 40cm minimum focusing distance to infinity, this lens creates very sharp images with high contrast. The HSM design provides quiet, high-speed autofocus shooting, as well as full-time manual focus override. With a large maximum aperture of f/1.4, this Sigma lens can perform superbly in a great range of applications, including snapshots, portraiture, indoor shooting and landscape photography.