Comparison of Canon EF 24-105mm f/4L IS II USM and Tamron SP AF 28-105mm f/2.8 LD Aspherical IF

Attribute	Tamron SP AF 28-105mm f/2.8 LD Aspherical IF ×	Canon EF 24-105mm f/4L IS II USM ×
Notes	Available AF Mounts: Canon, Minolta, Nikon; Included Accessories: Lens Hood, Case	4-stop image stabilization; dust and moisture resistant
Magnification Ratio (x)	0.21	0.23
Filter Size (mm)	82	77
Length (mm)	112	118
Closest Focus (m)	0.5	0.45
Diagonal Angle of View (degree)	24.00 - 75.00	23.30 - 84.00
Focus Details	Internal	Inner focusing; AF with USM, full-time manual focus
Focal Length (mm)	28.00 - 105.00	24.00 - 105.00
APS Equivalent	1.5x: 42 - 157.5mm; 1.6x: 44.8 - 168mm	38 - 168mm
Brand	Tamron	Canon
Image Circle	35mm	35mm
Name	Tamron SP AF 28-105mm f/2.8 LD Aspherical IF	Canon EF 24-105mm f/4L IS II USM
Weight (g)	880	795
Type	Standard Zoom	Standard Zoom
Aperture (f)	2.80 - 22.00	4.00 - 22.00
Diaphragm Blades	9	10
Diaphragm Blades Type	-	rounded
Lens Construction	15 elements in 13 groups, including 4 aspherical and 3 LD elements	17 elements in 12 groups, including 4 glass-molded (GMo) aspherical elements on 5 surfaces
Zoom System	Rotary with "Anti-Slip Mode"	Rotating
Diameter (mm)	87	83.5