Comparison of Canon EF-S 17-55mm f/2.8 IS USM and Olympus 12-60mm ƒ/2.8-4 SWD Zuiko Digital ED

Attribute	Canon EF-S 17-55mm f/2.8 IS USM ×	Olympus 12-60mm ƒ/2.8-4 SWD Zuiko Digital ED ×
Filter Size (mm)	77	72
Notes	Image Stabilization; Included Accessories: Lens Hood EW-83J	Dust and drip proof. Includes Lens Hood (LH-75B) and Lens Case (LC-72B)
Closest Focus (m)	0.35	0.25
Magnification Ratio (x)	0.17	0.28
Diaphragm Blades Type	-	circular
Type	Standard Zoom	Standard Zoom
APS Equivalent	27 - 88mm	-
Zoom System	Rotary	Rotary
Image Circle	APS-C	Image Circle
Focal Length (mm)	17.00 - 55.00	12.00 - 60.00
Brand	Canon	Olympus
Name	Canon EF-S 17-55mm f/2.8 IS USM	Olympus 12-60mm ƒ/2.8-4 SWD Zuiko Digital ED
Weight (g)	645	575
Aperture (f)	2.80 - 22.00	2.80 - 22.00
Diaphragm Blades	7	7
Diagonal Angle of View (degree)	27.80 - 78.50	20.00 - 84.00
Lens Construction	19 elements in 12 groups	14 elements in 10 groups, including 1 Super ED, 2 ED, 1 Aspherical ED and 2 Aspherical elements
Diameter (mm)	83.5	79.5
Length (mm)	110.6	98.5
35mm Equivalent	-	24 - 120mm
Focus Details	USM with full-time manual focusing	-