The Sigma 17-40mm f1.8 DC Art for L-Mount is a premium APS-C zoom lens offering a constant f1.8 aperture across the entire focal length. Its advanced optical design features 17 elements in 11 groups, including four SLD and four aspherical elements for precise correction of aberrations. With an internal zoom, HLA linear autofocus, two AFL buttons, and a dedicated aperture ring, it is ideal for hybrid photo and video use.
