Comparison of Canon EF 200mm f/2L IS USM and Tamron SP AF 300mm f/2.8 LD IF

Attribute	Tamron SP AF 300mm f/2.8 LD IF ×	Canon EF 200mm f/2L IS USM ×
Aperture (f)	2.80 - 32.00	2.00 - 32.00
Filter Size (mm)	43	52
Notes	Available AF Mounts: Canon, Minolta, Nikon; Included Accessories: Lens Hood, Case	Image Stabilization
Closest Focus (m)	2.5	1.9
Magnification Ratio (x)	0.141	0.12
Diameter (mm)	120	128
Focus Details	Internal; Focus ring slides back and forth to switch between AF and MF	Internal focusing; full-time manual focus and USM
Focal Length (mm)	300.00	200.00
Diaphragm Blades	9	8
Brand	Tamron	Canon
Image Circle	35mm	35mm
Name	Tamron SP AF 300mm f/2.8 LD IF	Canon EF 200mm f/2L IS USM
Weight (g)	2800	2520
Type	Telephoto Prime	Telephoto Prime
Diaphragm Blades Type	-	circular
Lens Construction	10 elements in 7 groups, including 2 LD elements	17 elements in 12 groups, including flourite and UD elements
Diagonal Angle of View (degree)	8.00	12.00
Length (mm)	215.9	208
APS Equivalent	1.5x: 450mm; 1.6x: 480mm	-
APS-C Equivalent	-	320mm