L-Mount Lens/Full-Frame Format Aperture Range: f/1.4 to f/16 Two FLD Elements, Three SLD Elements Three Aspherical Elements A favored wide-angle prime, the Leica L-mount Sigma 28mm f/1.4 DG HSM Art Lens is a versatile lens with a classic broad field of view that suits everything from street shooting to landscape photography. Impressively bright, the fast f/1.4 maximum aperture is ideal for working in low-light conditions