Comparison of Olympus 18-180mm f/3.5-6.3 Zuiko Digital and Sigma 18-200mm f/3.5-6.3 II DC OS HSM

Attribute	Sigma 18-200mm f/3.5-6.3 II DC OS HSM ×	Olympus 18-180mm f/3.5-6.3 Zuiko Digital ×
Aperture (f)	3.50 - 22.00	3.50 - 22.00
Diagonal Angle of View (degree)	7.10 - 69.30	6.90 - 62.00
Filter Size (mm)	62	62
Notes	Image Stabilization (up to 4 stops); Available OS AF mounts: Sigma, Canon, Nikon; Non-OS AF mounts: Sony, Pentax. Includes petal-type lens hood.	Includes Lens Hood (LH-65)
Focus Details	Internal HSM (Hyper Sonic Motor) with AF/MF switch	-
Type	Standard Zoom	Standard Zoom
Diaphragm Blades	7	7
35mm Equivalent	-	36 - 360mm
Image Circle	Image Circle	Image Circle
Focal Length (mm)	18.00 - 200.00	18.00 - 180.00
Brand	Sigma	Olympus
Name	Sigma 18-200mm f/3.5-6.3 II DC OS HSM	Olympus 18-180mm f/3.5-6.3 Zuiko Digital
Weight (g)	490	440
Zoom System	Rotary	Rotary
Lens Construction	18 elements in 14 groups, including 1 FLD, 2 SLD and 2 aspherical elements	15 elements in 13 groups, including 2 ED and 2 aspherical lenses
Diameter (mm)	75.3	84.5
Closest Focus (m)	0.45	0.45
APS Equivalent	1.5x: 27 - 300mm; 1.6x: 28.8 - 320mm	-
Length (mm)	87.7	78
Diaphragm Blades Type	rounded	-
Magnification Ratio (x)	0.26	0.23