Comparison of Sony SAL-1870 DT 18-70mm f/3.5-5.6 and Tamron AF 28-80mm f/3.5-5.6 Aspherical

Attribute	Tamron AF 28-80mm f/3.5-5.6 Aspherical ×	Sony SAL-1870 DT 18-70mm f/3.5-5.6 ×
Filter Size (mm)	58	55
Closest Focus (m)	0.7	0.38
Magnification Ratio (x)	0.13	0.25
Length (mm)	70.4	77
Front Element Rotation	-	-
Diagonal Angle of View (degree)	30.00 - 75.00	23.00 - 76.00
Focus Details	-	Front focusing
Focal Length (mm)	28.00 - 80.00	18.00 - 70.00
APS Equivalent	1.5x: 42 - 120mm; 1.6x: 44.8 - 128mm	27 - 105mm
Brand	Tamron	Sony
Image Circle	35mm	APS-C
Name	Tamron AF 28-80mm f/3.5-5.6 Aspherical	Sony SAL-1870 DT 18-70mm f/3.5-5.6
Weight (g)	237	235
Type	Standard Zoom	Standard Zoom
Notes	Available AF Mounts: Canon, Minolta, Nikon; Included Accessories: Lens Hood	Included Accessories: SH0006 Lens Hood
Diaphragm Blades	6	7
Aperture (f)	3.50 - 22.00	3.50 - 36.00
Lens Construction	7 elements in 7 groups	11 elements in 9 groups, including 1 aspheric and 1 ED glass elements
Zoom System	Rotary	Rotary
Diameter (mm)	72	66