Comparison of Canon EF 70-200mm f/2.8L IS III USM and Tamron 70-200mm ƒ/2.8 Di VC USD SP (Model A009)

Attribute	Canon EF 70-200mm f/2.8L IS III USM ×	Tamron 70-200mm ƒ/2.8 Di VC USD SP (Model A009) ×
Aperture (f)	2.80 - 32.00	2.80 - 32.00
Filter Size (mm)	77	77
Notes	Image stabilization with up to 3.5 stops of correction (CIPA); Dust and moisture resistant.	Available mounts: Canon, Nikon, Sony; Optical Image Stabilization; Included Accessories: Flower-shaped lens hood, detachable tripod mount
Closest Focus (m)	1.2	1.3
Magnification Ratio (x)	0.21	0.13
Zoom System	Rotary	Rotary
Type	Telephoto Zoom	Telephoto Zoom
APS Equivalent	112 - 320mm	1.5x: 105 - 300mm; 1.6x: 112 - 320mm
Diaphragm Blades	8	9
Image Circle	35mm	35mm
Focal Length (mm)	70.00 - 200.00	70.00 - 200.00
Brand	Canon	Tamron
Name	Canon EF 70-200mm f/2.8L IS III USM	Tamron 70-200mm ƒ/2.8 Di VC USD SP (Model A009)
Weight (g)	1440	1470
Diaphragm Blades Type	rounded	rounded
Lens Construction	23 elements in 19 groups, including 1 flourite element and 5 UD elements; Air Sphere coating; Fluorine coating	23 elements in 17 groups, including 1 special XLD (Extra Low Dispersion) and 4 LD (Low Dispersion) elements
Diagonal Angle of View (degree)	12.00 - 34.00	12.30 - 34.30
Length (mm)	199	196.7
Diameter (mm)	88.8	85.8
Focus Details	Internal; Ultrasonic Motor (USM) with full-time manual focus; Focus limit switch	Internal Focusing; USD (Ultrasonic Silent Drive) with continuous manual focus mechanism