Comparison of Sigma 19mm F2.8 EX DN and Tamron 24mm f/2.8 Di III OSD M1:2 (Model F051)

Attribute	Tamron 24mm f/2.8 Di III OSD M1:2 (Model F051) ×	Sigma 19mm F2.8 EX DN ×
Aperture (f)	2.80 - 22.00	2.80 - 22.00
Filter Size (mm)	67	46
Notes	Available mounts: Sony E-mount; Moisture-resistant construction; Included Accessories: Flower-shaped hood, lens caps.	Lens mounts: Sony E-Mount, Micro Four Thirds. Sigma's Super Multi-Layer Coating.
Closest Focus (m)	0.12	0.2
Magnification Ratio (x)	0.5	0.14
Diameter (mm)	73	60.6
Type	Wide Prime	Wide Prime
APS Equivalent	-	1.5x: 28.5mm; 2.0x: 38mm
Diaphragm Blades	7	7
Image Circle	Image Circle	APS-C
Focal Length (mm)	24.00	19.00
Brand	Tamron	Sigma
Name	Tamron 24mm f/2.8 Di III OSD M1:2 (Model F051)	Sigma 19mm F2.8 EX DN
Weight (g)	215	140
Diaphragm Blades Type	circular	rounded
Lens Construction	10 elements in 9 groups, including 1 GM (Glass Molded) aspherical and 3 LD (Low Dispersion) elements; BBAR coating; Fluorine coating	8 elements in 6 groups, including 3 aspherical elements
Diagonal Angle of View (degree)	84.10	59.30
Length (mm)	64	45.7
35mm Equivalent	1.5x: 36mm	-
Focus Details	Internal with OSD (Optimized Silent Drive) motor; Continuous manual focus mechanism	Inner focusing with linear AF motor