Comparison of Sony 18-135mm f/3.5-5.6 DT SAM SAL18135 and Tamron AF 28-105mm f/4-5.6 IF

Attribute	Sony 18-135mm f/3.5-5.6 DT SAM SAL18135 ×	Tamron AF 28-105mm f/4-5.6 IF ×
Magnification Ratio (x)	0.27	0.18
Filter Size (mm)	62	62
Focus Details	Internal focusing; Smooth Autofocus Motor (SAM) with Direct Manual Focus (DMF)	Internal
Closest Focus (m)	0.45	0.5
Lens Construction	15 elements in 13 groups, including 3 aspheric and 2 ED glass elements	15 elements in 12 groups
Length (mm)	85.5	73
Focal Length (mm)	18.00 - 135.00	28.00 - 105.00
Diaphragm Blades Type	circular	-
Brand	Sony	Tamron
Image Circle	APS-C	35mm
Name	Sony 18-135mm f/3.5-5.6 DT SAM SAL18135	Tamron AF 28-105mm f/4-5.6 IF
Weight (g)	405	305
Type	Standard Zoom	Standard Zoom
Notes	Sony A-Mount. Included Accessories: SH0008 petal lens hood, caps	Available AF Mounts: Canon, Minolta, Nikon; Included Accessories: Lens Hood
APS Equivalent	27 - 202.5mm	1.5x: 42-157.5mm; 1.6x: 44.8-168mm
Aperture (f)	3.50 - 40.00	4.00 - 22.00
Diaphragm Blades	7	6
Zoom System	Rotary	Rotary
Diameter (mm)	73	71