Comparison of Olympus 12-60mm ƒ/2.8-4 SWD Zuiko Digital ED and Sigma 17-70mm ƒ/2.8-4 DC Macro OS HSM

Attribute	Olympus 12-60mm ƒ/2.8-4 SWD Zuiko Digital ED ×	Sigma 17-70mm ƒ/2.8-4 DC Macro OS HSM ×
Aperture (f)	2.80 - 22.00	2.80 - 22.00
Diaphragm Blades Type	circular	rounded
Filter Size (mm)	72	72
Notes	Dust and drip proof. Includes Lens Hood (LH-75B) and Lens Case (LC-72B)	Image Stabilized. Available AF Mounts: Canon, Nikon, Pentax, Sigma, Sony
Focus Details	-	Internal, with Hyper-Sonic Motor; AF/MF switch
Type	Standard Zoom	Standard Zoom
Diaphragm Blades	7	7
Diameter (mm)	79.5	79
Image Circle	Image Circle	APS-C
Focal Length (mm)	12.00 - 60.00	17.00 - 70.00
Brand	Olympus	Sigma
Name	Olympus 12-60mm ƒ/2.8-4 SWD Zuiko Digital ED	Sigma 17-70mm ƒ/2.8-4 DC Macro OS HSM
Weight (g)	575	535
Diagonal Angle of View (degree)	20.00 - 84.00	20.20 - 72.40
Lens Construction	14 elements in 10 groups, including 1 Super ED, 2 ED, 1 Aspherical ED and 2 Aspherical elements	17 elements in 13 groups, including 1 ELD and 3 aspherical elements
Zoom System	Rotary	Rotary with lock
Closest Focus (m)	0.25	0.22
35mm Equivalent	24 - 120mm	-
Length (mm)	98.5	88.9
APS Equivalent	-	1.5x: 25.5 - 105mm; 1.6x: 27.2 - 112mm
Magnification Ratio (x)	0.28	0.37