Comparison of Canon EF 24-70mm ƒ/2.8L II USM and Sigma 24-70mm f/2.8 DG DN Art

Attribute	Sigma 24-70mm f/2.8 DG DN Art ×	Canon EF 24-70mm ƒ/2.8L II USM ×
Aperture (f)	2.80 - 22.00	2.80 - 22.00
Filter Size (mm)	82	82
Notes	Available AF Mounts: L-Mount, E-Mount; Mount with dust- and splash-proof design	Weather sealing protects against dust and moisture, while a fluorine-coated front and rear elements are easy to clean.
Closest Focus (m)	0.18	0.38
Magnification Ratio (x)	0.34	0.21
Zoom System	Rotary (with zoom lock)	Rotating, with zoom lock lever
Type	Standard Zoom	Standard Zoom
APS Equivalent	36 - 105mm	38 - 112mm
Diaphragm Blades	11	9
Image Circle	35mm	35mm
Focal Length (mm)	24.00 - 70.00	24.00 - 70.00
Brand	Sigma	Canon
Name	Sigma 24-70mm f/2.8 DG DN Art	Canon EF 24-70mm ƒ/2.8L II USM
Weight (g)	835	805
Diaphragm Blades Type	rounded	rounded
Lens Construction	19 elements in 15 groups, including 6 FLD, 2 SLD and 3 aspherical elements; Super Multi-Layer Coating, Nano Porous Coating.	18 elements in 13 groups, including 1 Super UD and 2 UD elements
Diagonal Angle of View (degree)	34.30 - 84.10	34.00 - 84.00
Length (mm)	122.9	113
Diameter (mm)	87.8	88.5
Focus Details	Internal focus with stepping motor; AF/MF switch; AFL button	Inner focusing; full-time manual focus and USM