Comparison of Sony FE 28mm ƒ/2 SEL28F20 and Tamron 20mm f/2.8 Di III OSD M1:2 (Model F050)

Attribute	Tamron 20mm f/2.8 Di III OSD M1:2 (Model F050) ×	Sony FE 28mm ƒ/2 SEL28F20 ×
Aperture (f)	2.80 - 22.00	2.00 - 22.00
Filter Size (mm)	67	49
Notes	Available mounts: Sony E-mount; Moisture-resistant construction; Included Accessories: Flower-shaped hood, lens caps.	Sony FE-Mount; Included accessories: lens hood, front and rear lens caps.
Closest Focus (m)	0.11	0.29
Magnification Ratio (x)	0.5	0.13
Diameter (mm)	73	64
Type	Wide Prime	Wide Prime
APS Equivalent	-	42mm
Diaphragm Blades	7	9
Image Circle	Image Circle	35mm (Full-frame E-Mount)
Focal Length (mm)	20.00	28.00
Brand	Tamron	Sony
Name	Tamron 20mm f/2.8 Di III OSD M1:2 (Model F050)	Sony FE 28mm ƒ/2 SEL28F20
Weight (g)	220	200
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	9 elements in 8 groups, including 3 aspherical and 2 ED elements
Diagonal Angle of View (degree)	94.50	75.00
Length (mm)	64	60
35mm Equivalent	1.5x: 30mm	-
Focus Details	Internal with OSD (Optimized Silent Drive) motor; Continuous manual focus mechanism	Autofocus with advanced linear actuator; inner focusing