Comparison of Olympus 11-22mm f/2.8-3.5 Zuiko Digital and Sigma 17-35mm f/2.8-4 EX DG Aspherical HSM

Attribute	Sigma 17-35mm f/2.8-4 EX DG Aspherical HSM ×	Olympus 11-22mm f/2.8-3.5 Zuiko Digital ×
Notes	Available AF Mounts: [HSM version]: Sigma, Canon, Nikon; [w/o HSM]: Minolta, Pentax	Includes Lens Hood (LH-75) and Lens Case (LSC-0918); Compatible with TC-14 Teleconverter
Aperture (f)	2.80 - 22.00	2.80 - 22.00
Magnification Ratio (x)	0.22	0.13
Filter Size (mm)	77	72
Focus Details	Internal Focus; HSM with full-time manual override	-
Type	Wide Zoom	Wide Zoom
Diaphragm Blades	8	7
Diameter (mm)	83.5	75
Image Circle	35mm	Image Circle
Focal Length (mm)	17.00 - 35.00	11.00 - 22.00
Brand	Sigma	Olympus
Name	Sigma 17-35mm f/2.8-4 EX DG Aspherical HSM	Olympus 11-22mm f/2.8-3.5 Zuiko Digital
Weight (g)	560	485
Diagonal Angle of View (degree)	63.40 - 103.70	53.00 - 89.00
Lens Construction	16 elements in 13 groups, including 2 aspherical and 1 SLD elements	12 elements in 10 groups, including 2 aspherical elements
Zoom System	Rotary	Rotary
Front Element Rotation	-	-
35mm Equivalent	-	22 - 44mm
Length (mm)	88.7	92.5
APS Equivalent	1.5x: 25.5 - 52.5mm; 1.6x: 27.2 - 56mm	-
Closest Focus (m)	0.27	0.28