Comparison of Canon EF 100mm ƒ/2.8 Macro USM and Sigma 70mm f/2.8 DG Macro Art

Attribute	Canon EF 100mm ƒ/2.8 Macro USM ×	Sigma 70mm f/2.8 DG Macro Art ×
Filter Size (mm)	58	49
Aperture (f)	2.80 - 32.00	2.80 - 22.00
Closest Focus (m)	0.31	0.26
Magnification Ratio (x)	1	1
Type	Telephoto Prime Macro	Telephoto Prime Macro
Focus Details	Inner focusing; full-time manual focus and USM	Internal with focus-by-wire system using coreless DC motor; full-time manual override (see release text)
APS Equivalent	160mm	1.5x: 105mm; 1.6x: 112mm
Notes	-	Available AF Mounts: Sigma SA, Canon EF, L-Mount, Sony E; Dust- and splash-proof construction
Image Circle	35mm	35mm
Focal Length (mm)	100.00	70.00
Brand	Canon	Sigma
Name	Canon EF 100mm ƒ/2.8 Macro USM	Sigma 70mm f/2.8 DG Macro Art
Weight (g)	600	515
Diagonal Angle of View (degree)	24.00	34.30
Diaphragm Blades	8	9
Diameter (mm)	79	70.8
Length (mm)	119	105.8
Diaphragm Blades Type	-	rounded
Lens Construction	12 elements in 8 groups, including 2 aspherical elements	13 elements in 10 groups, including 2 aspherical elements, 2 FLD glass elements, 2 SLD glass elements, and one element with a high rate of anomalous