SIGMA 17-70mm F2.8-4 DC HSM Macro OS เทคโนโลยีเลนส์ล่าสุด

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The “old” Sigma AF 17-70mm f/2.8-4.5 DC is/was one of the more popular standard zoom lenses. It provides a longer reach than the average “kit” zoom lenses (usually 18-55mm f/3.5-5.6 variants) yet it’s a bit more affordable than the typical mid-grade zoom lenses a la Canon EF-S 17-85mm f/4-5.6 USM IS or Nikkor AF-S 16-85mm f/3.5-5.6 VR … and it’s 2/3 f-stops “faster”. In our previous tests it performed pretty well. But the initially released version relied on a fairly dated screw drive, which made it an unattractive choice for most Nikon DX users. Sigma upgraded the F-mount version of the lens to an HSM drive (the Canon variant uses a DC motor instead), but still the lens lacked one important feature: optical image stabilization. Well, it seems as if Sigma agreed here because they eventually released the Sigma AF 17-70mm f/2.8-4 DC HSM OS.