The Sigma8–16mm lens is an enthusiast-level, ultra wide-angle rectilinear zoom lens made by Sigma Corporation specifically for use with APS-C small format
150mm f/2.8 APO EX DG HSM Macro Sigma 180mm f/3.5 APO EX DG IF HSM Macro† Sigma 180mm f/2.8 EX DG OS HSM APO Macro Sigma8-16mmf/4.5–5.6 DC HSM Sigma 10–20mm
offering the same focal length range but a constant maximum aperture of f/4. The Sigma8–16mm, introduced in 2010, a rectilinear ultra-wide zoom designed