Comparison of Sigma 45mm f/2.8 DG DN Contemporary and Sony SAL-50F14 50mm f/1.4

Attribute	Sony SAL-50F14 50mm f/1.4 ×	Sigma 45mm f/2.8 DG DN Contemporary ×
Magnification Ratio (x)	0.15	0.25
Filter Size (mm)	55	55
Focus Details	-	Smooth, quiet and high-speed AF via stepping motor
Closest Focus (m)	0.45	0.24
Lens Construction	7 elements in 6 groups	8 elements in 7 groups
Length (mm)	43	46.2
Focal Length (mm)	50.00	45.00
Diaphragm Blades Type	-	rounded
Brand	Sony	Sigma
Image Circle	35mm	35mm
Name	Sony SAL-50F14 50mm f/1.4	Sigma 45mm f/2.8 DG DN Contemporary
Weight (g)	220	215
Type	Standard Prime	Wide Prime
Notes	Included Accessories: SH0011 Lens Hood	Available AF Mounts: L-Mount, Sony E-Mount
APS Equivalent	75mm	1.5x: 67.5mm; 1.6x: 72mm
Aperture (f)	1.40 - 22.00	2.80 - 22.00
Diaphragm Blades	7	7
Diagonal Angle of View (degree)	47.00	51.30
Diameter (mm)	65.5	64