Comparison of Canon EF 28-105mm f/4-5.6 USM and Tamron AF 28-80mm f/3.5-5.6 Aspherical

Attribute	Tamron AF 28-80mm f/3.5-5.6 Aspherical ×	Canon EF 28-105mm f/4-5.6 USM ×
Filter Size (mm)	58	58
Aperture (f)	3.50 - 22.00	4.00 - 32.00
Closest Focus (m)	0.7	0.48
Magnification Ratio (x)	0.13	0.19
Type	Standard Zoom	Standard Zoom
Focus Details	-	Inner focusing; full-time manual focus and USM
APS Equivalent	1.5x: 42 - 120mm; 1.6x: 44.8 - 128mm	45 - 168mm
Diameter (mm)	72	67
Image Circle	35mm	35mm
Focal Length (mm)	28.00 - 80.00	28.00 - 105.00
Brand	Tamron	Canon
Name	Tamron AF 28-80mm f/3.5-5.6 Aspherical	Canon EF 28-105mm f/4-5.6 USM
Weight (g)	237	210
Diagonal Angle of View (degree)	30.00 - 75.00	23.30 - 75.00
Diaphragm Blades	6	6
Zoom System	Rotary	Rotary
Length (mm)	70.4	68
Notes	Available AF Mounts: Canon, Minolta, Nikon; Included Accessories: Lens Hood	-
Lens Construction	7 elements in 7 groups	10 elements in 9 groups, including 1 aspherical element