Comparison of Sigma 19mm F2.8 EX DN and Sony 30mm f/2.8 DT Macro SAM SAL-30M28

Attribute	Sony 30mm f/2.8 DT Macro SAM SAL-30M28 ×	Sigma 19mm F2.8 EX DN ×
Magnification Ratio (x)	1	0.14
Filter Size (mm)	49	46
Focus Details	Smooth Autofocus Motor (SAM)	Inner focusing with linear AF motor
Closest Focus (m)	0.13	0.2
Lens Construction	6 elements in 5 groups	8 elements in 6 groups, including 3 aspherical elements
Length (mm)	45	45.7
Focal Length (mm)	30.00	19.00
Diaphragm Blades Type	rounded	rounded
Brand	Sony	Sigma
Image Circle	APS-C	APS-C
Name	Sony 30mm f/2.8 DT Macro SAM SAL-30M28	Sigma 19mm F2.8 EX DN
Weight (g)	150	140
Type	Wide Prime Macro	Wide Prime
Notes	-	Lens mounts: Sony E-Mount, Micro Four Thirds. Sigma's Super Multi-Layer Coating.
APS Equivalent	45mm	1.5x: 28.5mm; 2.0x: 38mm
Aperture (f)	2.80 - 22.00	2.80 - 22.00
Diaphragm Blades	7	7
Diagonal Angle of View (degree)	50.00	59.30
Diameter (mm)	70	60.6