Comparison of Canon EF 20-35mm f/3.5-4.5 USM and Tamron 10-24mm ƒ/3.5-4.5 Di II LD SP AF

Attribute	Tamron 10-24mm ƒ/3.5-4.5 Di II LD SP AF ×	Canon EF 20-35mm f/3.5-4.5 USM ×
Filter Size (mm)	77	77
Aperture (f)	3.50 - 22.00	3.50 - 27.00
Closest Focus (m)	0.24	0.34
Magnification Ratio (x)	0.2	0.13
Type	Wide Zoom	Wide Zoom
Focus Details	Internal, with AF/MF switch	Inner focusing; full-time manual focus and USM;
APS Equivalent	1.5x: 15 - 36mm; 1.6x: 16 - 38.4mm	32 - 56mm
Diameter (mm)	83.2	83.5
Image Circle	APS-C	35mm
Focal Length (mm)	10.00 - 24.00	20.00 - 35.00
Brand	Tamron	Canon
Name	Tamron 10-24mm ƒ/3.5-4.5 Di II LD SP AF	Canon EF 20-35mm f/3.5-4.5 USM
Weight (g)	370	340
Diagonal Angle of View (degree)	60.30 - 108.70	63.00 - 94.00
Diaphragm Blades	7	5
Zoom System	Rotary	Rotary
Length (mm)	86.5	68.9
Notes	Included Accessories: Flower-Shaped Lens Hood; Available AF Mounts: Canon, Nikon, Pentax, Sony	-
Lens Construction	12 elements in 9 groups, including 1 HID glass element and 2 LD glass elements	12 elements in 11 groups