Comparison of Canon EF 28-200mm f/3.5-5.6 USM and Sigma 18-200mm f/3.5-6.3 II DC OS HSM

Attribute	Canon EF 28-200mm f/3.5-5.6 USM ×	Sigma 18-200mm f/3.5-6.3 II DC OS HSM ×
Diagonal Angle of View (degree)	12.00 - 75.00	7.10 - 69.30
Filter Size (mm)	72	62
Aperture (f)	3.50 - 36.00	3.50 - 22.00
Closest Focus (m)	0.45	0.45
Magnification Ratio (x)	0.28	0.26
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.
Type	Standard Zoom	Standard Zoom
APS Equivalent	45 - 320mm	1.5x: 27 - 300mm; 1.6x: 28.8 - 320mm
Diaphragm Blades	6	7
Image Circle	35mm	Image Circle
Focal Length (mm)	28.00 - 200.00	18.00 - 200.00
Brand	Canon	Sigma
Name	Canon EF 28-200mm f/3.5-5.6 USM	Sigma 18-200mm f/3.5-6.3 II DC OS HSM
Weight (g)	500	490
Zoom System	Rotary	Rotary
Lens Construction	16 elements in 12 groups, including 2 aspherical elements	18 elements in 14 groups, including 1 FLD, 2 SLD and 2 aspherical elements
Diameter (mm)	78.4	75.3
Length (mm)	89.6	87.7
Diaphragm Blades Type	-	rounded
Focus Details	Inner focusing; USM	Internal HSM (Hyper Sonic Motor) with AF/MF switch