Comparison of Olympus 11-22mm f/2.8-3.5 Zuiko Digital and Sigma 10-20mm ƒ/3.5 EX DC HSM

Attribute	Sigma 10-20mm ƒ/3.5 EX DC HSM ×	Olympus 11-22mm f/2.8-3.5 Zuiko Digital ×
Notes	Available AF mounts: Sigma, Canon, Nikon, Sony, Pentax; Included Accessories: Soft Case, Petal-type Hood	Includes Lens Hood (LH-75) and Lens Case (LSC-0918); Compatible with TC-14 Teleconverter
Aperture (f)	3.50 - 22.00	2.80 - 22.00
Magnification Ratio (x)	0.15	0.13
Filter Size (mm)	82	72
Focus Details	Internal with HSM	-
Type	Wide Zoom	Wide Zoom
Diaphragm Blades	7	7
Diameter (mm)	87.3	75
Image Circle	Image Circle	Image Circle
Focal Length (mm)	10.00 - 20.00	11.00 - 22.00
Brand	Sigma	Olympus
Name	Sigma 10-20mm ƒ/3.5 EX DC HSM	Olympus 11-22mm f/2.8-3.5 Zuiko Digital
Weight (g)	520	485
Diagonal Angle of View (degree)	63.80 - 102.40	53.00 - 89.00
Lens Construction	13 elements in 10 groups, including 4 aspherical, 1 SLD and 2 ELD elements	12 elements in 10 groups, including 2 aspherical elements
Zoom System	Rotary	Rotary
Front Element Rotation	-	-
35mm Equivalent	-	22 - 44mm
Length (mm)	88.2	92.5
APS Equivalent	1.5x: 15 - 30mm; 1.6x: 16 - 32mm	-
Closest Focus (m)	0.24	0.28