A wide and fast Canon eve-mount prime, the'24mm f/ 1.4 DG HSM lenses a member of the highly regarded art line of'sigma's'global vision series and is characterized by its advanced optical construction and robust physical design. The combination of three "f" low dispersion (FLD) elements and four special low dispersion elements help to achieve a marked reduction in chromatic aberrations, while a pair of aspherical elements, with one positioned in the rear of the lens, minimize a variety of additional distortions and aberrations.