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17-70mm focal lengthc 72mm filters F2.8-4 maximum aperture; F22-22 minimum Image stabilizationc Compatible with Sigmas USB Dock Compatible with APS-C format DSLRs 0.22m/8.66 minimum focusExtra Description
The 17-70mm F2.8-4 DC Macro HSM OS is the first lens in the category of Sigma’s Global Vision. The Sigma 17-70mm F2.8-4 was designed to be the ideal all-purpose lens for APS-C sized sensors. With a great focal length and macro capabilityc the 17-70mm F2.8-4 is also equipped with a Hyper Sonic Motor (HSM) and an Optical Stabilizer (OS) for superior image quality. The HSM ensures quietc accuratec and fast autofocusing while the OS compensates for camera shake when shooting by hand. The construction of the 17-70mm includes new TSC material (Thermally Stable Composite)c which allows for increased durability as well a reduction in size by 30% compared to conventional models. Two FLD glass elementsc which have performance equal to fluoritec are incorporated with one SLD element to reduce color aberration at the highest degree. The 17-70mm F2.8-4 Macro DC HSM OS is compatible with the Sigma USB dock for an increased level of customization. The perfect all-purpose travel lensc the 17-70mm F2.8 Macro DC HSM OS is a must have for any camera bag.
I also have the Nikon 16-80. The Sigma is on a par with it. The Nikon seems to have a better SOOTC imagec but I dont think its worth twice the price of the Sigma. Plus the Sigma is physically smaller. If I didnt have some birthday cash to burnc I probably would have kept the sigmac not both...