Comparison of Canon EF 14mm f/2.8L USM and Tamron SP AF 14mm f/2.8 Aspherical IF

Attribute	Tamron SP AF 14mm f/2.8 Aspherical IF ×	Canon EF 14mm f/2.8L USM ×
Notes	Available AF Mounts: Canon, Minolta, Nikon, Pentax; Included Accessories: Lens Hood, Case	Fixed, petal-type hood; rear gelatin filter holder
Aperture (f)	2.80 - 22.00	2.80 - 22.00
Closest Focus (m)	0.2	0.25
Magnification Ratio (x)	0.15	0.1
Length (mm)	89	89
Focus Details	Internal	Inner focusing; full-time manual focus and USM
APS Equivalent	1.5x: 21mm; 1.6x: 22.4mm	22mm
Type	Wide Prime	Wide Prime
Image Circle	35mm	35mm
Focal Length (mm)	14.00	14.00
Brand	Tamron	Canon
Name	Tamron SP AF 14mm f/2.8 Aspherical IF	Canon EF 14mm f/2.8L USM
Weight (g)	661	560
Diagonal Angle of View (degree)	113.80	114.00
Diaphragm Blades	5	5
Diameter (mm)	87	77
Lens Construction	14 elements in 12 groups, including 2 hybrid aspherical elements	14 elements in 10 groups, including 1 aspherical element