Comparison of Canon EF 11-24mm ƒ/4L USM and Tamron SP 15-30mm ƒ/2.8 Di VC USD (Model A012)

Attribute	Canon EF 11-24mm ƒ/4L USM ×	Tamron SP 15-30mm ƒ/2.8 Di VC USD (Model A012) ×
Notes	Weather resistant; Subwavelength Coating (SWC) and Air Sphere Coating (ASC); Fluorine coating on front and rear lens surfaces; Built-in lens hood.	VC Image Stabilization; Available AF mounts: Canon EF, Nikon F, Sony A. Integrated petal type lens hood.
Aperture (f)	4.00 - 22.00	2.80 - 22.00
Closest Focus (m)	0.28	0.28
Magnification Ratio (x)	0.16	0.2
Type	Wide Zoom	Wide Zoom
Length (mm)	132	145
APS Equivalent	17.6 - 38.4mm	1.5x: 22.5 - 45mm; 1.6x: 24 - 48mm
Zoom System	Rotary	Rotating
Image Circle	35mm	Image Circle
Focal Length (mm)	11.00 - 24.00	15.00 - 30.00
Brand	Canon	Tamron
Name	Canon EF 11-24mm ƒ/4L USM	Tamron SP 15-30mm ƒ/2.8 Di VC USD (Model A012)
Weight (g)	1180	1100
Diaphragm Blades Type	rounded	circular
Diaphragm Blades	9	9
Diagonal Angle of View (degree)	84.00 - 126.10	71.60 - 110.50
Lens Construction	16 elements in 11 groups, including 1 Super UD, 1 UD and 4 aspherical elements	18 elements in 13 groups, including XGM (eXpanded Glass Molded) aspherical and several LD elements; BBAR (Broad-Band Anti-Reflection) coating
Diameter (mm)	108	98.4
Focus Details	Internal with ring USM; Full time manual focus	Ultrasonic Silent Drive USD motor with full-time MF mechanism