Comparison of Canon EF 24mm f/1.4L USM and Sigma 24mm ƒ/1.8 EX DG Aspherical Macro

Attribute	Sigma 24mm ƒ/1.8 EX DG Aspherical Macro ×	Canon EF 24mm f/1.4L USM ×
Diagonal Angle of View (degree)	84.10	84.00
Filter Size (mm)	77	77
Aperture (f)	1.80 - 22.00	1.40 - 22.00
Closest Focus (m)	0.18	0.25
Magnification Ratio (x)	0.37	0.16
Type	Wide Prime	Wide Prime
Focus Details	Dual Focus mechanism	Inner focusing; full-time manual focus and USM
APS Equivalent	1.5x: 36mm; 1.6x: 38.4mm	38mm
Diaphragm Blades	9	7
Image Circle	35mm	35mm
Focal Length (mm)	24.00	24.00
Brand	Sigma	Canon
Name	Sigma 24mm ƒ/1.8 EX DG Aspherical Macro	Canon EF 24mm f/1.4L USM
Weight (g)	485	550
Diameter (mm)	83.6	83
Length (mm)	82.5	77
Notes	Available AF Mounts: Sigma, Canon, Nikon, Minolta, Pentax, Four-Thirds	-
Lens Construction	10 elements in 9 groups, including 2 aspherical elements	11 elements in 9 groups, including 1 aspherical and 1 UD element