Comparison of Sigma 24-70mm f/2.8 DG OS HSM Art and Tamron SP 24-70mm f/2.8 Di VC USD G2 (Model A032)

Attribute	Tamron SP 24-70mm f/2.8 Di VC USD G2 (Model A032) ×	Sigma 24-70mm f/2.8 DG OS HSM Art ×
Filter Size (mm)	82	82
Notes	VC image stabilization (up to 5 stops); Moisture-resistant construction; Available mounts: Canon EF, Nikon F; Includes locking petal type lens hood	Available AF Mounts: Sigma SA, Canon EF, Nikon F; Image Stabilized; Mount with dust- and splash-proof design; Compatible with Mount Converter MC-11
Closest Focus (m)	0.38	0.37
Magnification Ratio (x)	0.2	0.21
Diameter (mm)	88.4	88
Type	Standard Zoom	Standard Zoom
APS Equivalent	-	1.5x: 36 - 105mm; 1.6x: 38.4 - 112mm
Diagonal Angle of View (degree)	34.30 - 84.00	34.30 - 84.10
Image Circle	Image Circle	35mm
Focal Length (mm)	24.00 - 70.00	24.00 - 70.00
Brand	Tamron	Sigma
Name	Tamron SP 24-70mm f/2.8 Di VC USD G2 (Model A032)	Sigma 24-70mm f/2.8 DG OS HSM Art
Weight (g)	905	1020
Aperture (f)	2.80 - 22.00	2.80 - 22.00
Diaphragm Blades	9	9
Diaphragm Blades Type	rounded	rounded
Lens Construction	17 elements in 12 groups, including 2 XR (Extra Refractive Index), 3 LD (Low Dispersion), 3 GM (Glass-Molded aspherical) and 1 hybrid aspherical lens	19 elements in 14 groups, including 4 aspherical and 3 SLD elements
Zoom System	Rotary	Rotary
Length (mm)	111	107.6
35mm Equivalent	1.5x: 36 - 105mm; 1.6x: 38.4 - 112mm	-
Focus Details	Internal with USD (Ultrasonic Silent Drive), continuous manual mechanism; High performance MPU	Internal focus; HSM with full-time manual override