Comparison of Canon EF 50mm f/1.2L USM and Sigma 30mm f/1.4 EX DC HSM

Attribute	Canon EF 50mm f/1.2L USM ×	Sigma 30mm f/1.4 EX DC HSM ×
Diameter (mm)	85.4	75.5
Aperture (f)	1.20 - 16.00	1.40 - 16.00
Diagonal Angle of View (degree)	46.00	45.00
Magnification Ratio (x)	0.15	0.1
Filter Size (mm)	72	62
Type	Standard Prime	Standard Prime
Closest Focus (m)	0.45	0.4
APS Equivalent	80mm	1.5x: 45mm; 1.6x: 48mm
Lens Construction	8 elements in 6 groups, including 1 glass molded (GMO) aspherical element	7 elements in 7 groups, including a hybrid aspherical lens and two Special Low Dispersion elements
Image Circle	35mm	Image Circle
Focal Length (mm)	50.00	30.00
Brand	Canon	Sigma
Name	Canon EF 50mm f/1.2L USM	Sigma 30mm f/1.4 EX DC HSM
Weight (g)	545	430
Diaphragm Blades	-	8
Length (mm)	65.5	59
Notes	-	Available AF mounts: [HSM version]: Sigma, Canon, Nikon, Four-Thirds; [w/o HSM]: Pentax, Sony
Focus Details	Ultrasonic Motor (USM) with full-time manual focus	Internal focusing system with HSM