The SLR Hut Sigma 50mm f/1.4 DG HSM Lens is a fast standard-length prime for high optical performance via the incorporation of both three Special Low Dispersion glass elements, and one molded-glass aspherical element. These elements, with an advanced optical design,k minimize sagittal coma flare and chromatic aberration, providing high image sharpness and clarity. The lens 's large diameter and floating system also help to correct for vignetting to ensure maintained peripheral brilliance. A super multi-coating has been applied to lens elements as well, reducing flare and ghosting for higher contrast and color fidelity.