Sigma 17-70mm f/2.8-4 DC Macro OS HSM Contemporary

Lens Reviews / Sigma Lenses i Lab tested
Lens Specifications
Name Sigma 17-70mm ƒ/2.8-4 DC Macro OS HSM Contemporary
Image Circle APS-C
Type Standard Zoom
Focal Length 17 - 70mm
APS Equivalent 1.5x: 25.5 - 105mm; 1.6x: 27.2 - 112mm
Max Aperture ƒ/2.8 - 4
Min Aperture ƒ/22
Diaphragm Blades 7 (rounded)
Lens Construction 16 elements in 14 groups, including FLD, SLD, and 3 aspherical elements
Diagonal Angle of View(Based on image circle) 79.7 to 22.9 degrees
Focus Details Internal, with Hyper-Sonic Motor; AF/MF switch
Front Element Rotation No
Zoom System Rotary with lock
Closest Focus 22cm / 8.7 in.
Magnification Ratio 0.34x / 1:2.9
Filter Size 72mm
Dimensions(Length x Diameter) 82mm x 79mm / 3.2 in. x 3.1 in.
Weight 470g / 16.6 oz
Notes Image Stabilized (up to 4 stops); Available AF Mounts: Canon, Nikon, Sigma, Pentax, Sony; Accessory: lens hood LH780-03.
Typical Online Price US$500