Comparison of Sigma APO 70-200mm f/2.8 EX DG Macro HSM and Tamron 70-200mm ƒ/2.8 Di VC USD SP (Model A009)

Attribute	Tamron 70-200mm ƒ/2.8 Di VC USD SP (Model A009) ×	Sigma APO 70-200mm f/2.8 EX DG Macro HSM ×
Aperture (f)	2.80 - 32.00	2.80 - 22.00
Filter Size (mm)	77	77
Notes	Available mounts: Canon, Nikon, Sony; Optical Image Stabilization; Included Accessories: Flower-shaped lens hood, detachable tripod mount	Available AF Mounts: Sigma, Canon, Nikon
Closest Focus (m)	1.3	1
Magnification Ratio (x)	0.13	0.29
Diameter (mm)	85.8	86.6
Type	Telephoto Zoom	Telephoto Zoom
APS Equivalent	1.5x: 105 - 300mm; 1.6x: 112 - 320mm	1.5x: 105 - 300mm; 1.6x: 112 - 320mm
Diaphragm Blades	9	9
Image Circle	35mm	35mm
Focal Length (mm)	70.00 - 200.00	70.00 - 200.00
Brand	Tamron	Sigma
Name	Tamron 70-200mm ƒ/2.8 Di VC USD SP (Model A009)	Sigma APO 70-200mm f/2.8 EX DG Macro HSM
Weight (g)	1470	1380
Diagonal Angle of View (degree)	12.30 - 34.30	12.30 - 34.30
Lens Construction	23 elements in 17 groups, including 1 special XLD (Extra Low Dispersion) and 4 LD (Low Dispersion) elements	18 elements in 15 groups, including 2 ELD and 2 SLD elements
Zoom System	Rotary	Rotary with lock; Internal
Length (mm)	196.7	184
Diaphragm Blades Type	rounded	-
Focus Details	Internal Focusing; USD (Ultrasonic Silent Drive) with continuous manual focus mechanism	Internal; HSM with full-time manual override