Comparison of Canon EF 24-70mm ƒ/4L IS USM and Sigma 24-60mm f/2.8 EX DG

Attribute	Canon EF 24-70mm ƒ/4L IS USM ×	Sigma 24-60mm f/2.8 EX DG ×
Notes	Hybrid Image Stabilization up to 4 stops; Macro function; Dust and moisture resistant	Available AF Mounts: Sigma, Canon, Nikon, Minolta, Pentax
Magnification Ratio (x)	0.7	0.17
Filter Size (mm)	77	77
Length (mm)	93	87.2
Closest Focus (m)	0.38	0.38
Diagonal Angle of View (degree)	34.00 - 84.00	39.60 - 84.10
Focus Details	Internal; USM with AF/MF switch	Internal Focus
Focal Length (mm)	24.00 - 70.00	24.00 - 60.00
APS Equivalent	38 - 112mm	1.5x: 36 - 90mm; 1.6x: 38.4 - 96mm
Brand	Canon	Sigma
Image Circle	35mm	35mm
Name	Canon EF 24-70mm ƒ/4L IS USM	Sigma 24-60mm f/2.8 EX DG
Weight (g)	600	550
Type	Standard Zoom	Standard Zoom
Aperture (f)	4.00 - 22.00	2.80 - 22.00
Diaphragm Blades	9	9
Diaphragm Blades Type	rounded	-
Lens Construction	15 elements in 12 groups, including 2 asperical and 2 UD elements	16 elements in 15 groups, including 4 aspherical and 2 SLD elements
Zoom System	Rotating	Rotary with lock
Diameter (mm)	83.4	83.6