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
lenses achieve extremely wide anglesofview, well beyond any rectilinear lens. Instead of producing images with straight lines of perspective (rectilinear
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