Sigma 17-50mm f/2.8 EX DC OS HSM

bythom sigma 17-50mm
  • DX coverage (Nikon), EF-S coverage (Canon)
  • Autofocus (in-lens focus motor)
  • 17 elements in 13 groups, 3 aspherical, FLD ED elements
  • 7-blade aperture diaphragm
  • smallest aperture is f/22 
  • 77mm filter ring
  • 11" (0.28m) minimum focus; 1:5 maximum reproduction ratio
  • 3.6 x 3.3" (91.8 x 83.5mm) long, diameter
  • 19.9 ounces (565g) weight
  • included LH825-03 583 petal lens hood, CL-1118 soft case, caps
  • US$980
  • Model Number 583

Thom's Mini Review: My choice for a fast mid-range DX lens most of the time, as it's smaller and lighter than the Nikkor 17-55mm, plus it has optical stabilization. Not internal focusing, though, which some may find problematic. Overall very sharp in the center when wide open, and even the edges at the 50mm end. Note there are some focus compatibility issue reports with some recent Nikon DSLRs (e.g. some D7xxx models).

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