Comparison of Canon EF-S 18-55mm f/4-5.6 IS STM and Sigma 28-70mm f/2.8-4

Attribute	Sigma 28-70mm f/2.8-4 ×	Canon EF-S 18-55mm f/4-5.6 IS STM ×
Magnification Ratio (x)	0.15	0.25
Filter Size (mm)	62	58
Length (mm)	60	61.8
Closest Focus (m)	0.5	0.25
Zoom System	Rotary	Rotary
Focus Details	-	AF (Stepper Motor), with manual focus option; inner focusing
Focal Length (mm)	28.00 - 70.00	18.00 - 55.00
Diaphragm Blades Type	-	circular
Brand	Sigma	Canon
Image Circle	35mm	APS-C
Name	Sigma 28-70mm f/2.8-4	Canon EF-S 18-55mm f/4-5.6 IS STM
Weight (g)	245	215
Type	Standard Zoom	Standard Zoom
Notes	Available AF Mounts: Sigma, Canon, Nikon, Minolta, Pentax; Included Accessories: Lens Hood	Image Stabilization (up to 4-stops of correction)
APS Equivalent	1.5x: 42 - 105mm; 1.6x: 44.8 - 112mm	29 - 88mm
Aperture (f)	2.80 - 22.00	4.00 - 32.00
Diaphragm Blades	8	7
Diagonal Angle of View (degree)	34.30 - 75.40	27.80 - 74.30
Lens Construction	11 elements in 8 groups, including 1 aspherical element	12 elements in 10 groups; Super Spectra coating
Front Element Rotation	-	-
Diameter (mm)	67.5	66.5