Comparison of Canon EF 70-200mm f/2.8L IS III USM and Sigma APO 70-200mm f/2.8 EX DG Macro HSM

Attribute	Canon EF 70-200mm f/2.8L IS III USM ×	Sigma APO 70-200mm f/2.8 EX DG Macro HSM ×
Notes	Image stabilization with up to 3.5 stops of correction (CIPA); Dust and moisture resistant.	Available AF Mounts: Sigma, Canon, Nikon
Magnification Ratio (x)	0.21	0.29
Filter Size (mm)	77	77
Length (mm)	199	184
Closest Focus (m)	1.2	1
Diagonal Angle of View (degree)	12.00 - 34.00	12.30 - 34.30
Focus Details	Internal; Ultrasonic Motor (USM) with full-time manual focus; Focus limit switch	Internal; HSM with full-time manual override
Focal Length (mm)	70.00 - 200.00	70.00 - 200.00
APS Equivalent	112 - 320mm	1.5x: 105 - 300mm; 1.6x: 112 - 320mm
Brand	Canon	Sigma
Image Circle	35mm	35mm
Name	Canon EF 70-200mm f/2.8L IS III USM	Sigma APO 70-200mm f/2.8 EX DG Macro HSM
Weight (g)	1440	1380
Type	Telephoto Zoom	Telephoto Zoom
Aperture (f)	2.80 - 32.00	2.80 - 22.00
Diaphragm Blades	8	9
Diaphragm Blades Type	rounded	-
Lens Construction	23 elements in 19 groups, including 1 flourite element and 5 UD elements; Air Sphere coating; Fluorine coating	18 elements in 15 groups, including 2 ELD and 2 SLD elements
Zoom System	Rotary	Rotary with lock; Internal
Diameter (mm)	88.8	86.6