A premium normal-length prime lens, the optical design of the Sigma 50mm f/1.4 DG HSM Art lens for Leica/Panasonic L-Mount generates beautiful bokeh and crisp resolution at the area in focus. The maximum f/1.4 aperture works well in low-light conditions and extends versatility of the lens to shoot everything from portraits to landscapes. A series of optical elements work together to minimize chromatic and spherical aberrations, and the HSM autofocus performance is fast, accurate and quiet. Versatile and precise A large-aperture, normal-length prime lens, the Sigma 50mm f/1.4 DG HSM Art lens works well in low-light conditions and features exceptional peripheral brightness with minimal distortion. A floating internal focusing system dramatically reduces aberration, and a Thermally Stable Composite (TSC) construction helps ensure minimal thermal shrinkage for greater overall performance in any shooting situation. Optical elements create crisp, clear imagery Three Special Low Dispersion (SLD) elements in the Sigma 50mm f/1.4 DG HSM Art lens work together to help minimize chromatic aberrations and color fringing, increasing color accuracy. One aspherical element helps reduce distortion, improving overall image clarity. A Super Multi-Layer coating on the lens elements helps minimize ghosting and flaring, generating greater color contrast and precision tonality. Focus faster, more quietly The Hyper Sonic Motor (HSM) in the Sigma 50mm f/1.4 DG HSM Art lens provides fast, smooth autofocusing, all while maintaining near-silent performance. Full-time manual focus is easily achieved by rotating the focus ring.