Comparison of Canon EF 100mm ƒ/2.8L Macro IS USM and Tamron 90mm ƒ/2.8 Di MACRO 1:1 VC USD SP (Model F017)

Attribute	Canon EF 100mm ƒ/2.8L Macro IS USM ×	Tamron 90mm ƒ/2.8 Di MACRO 1:1 VC USD SP (Model F017) ×
Filter Size (mm)	67	62
Notes	Image Stabilization: 4-stops; 3-stops at 0.5x magnification; 2-stops at 1.0x magnification	Available mounts: Canon EF, Nikon F, Sony A; Optical Image Stabilization (3.5 stops); Weather resistant; Compatible with TAMRON TAP-in Console
Closest Focus (m)	0.3	0.3
Magnification Ratio (x)	1	1
Type	Telephoto Prime Macro	Telephoto Prime Macro
Length (mm)	123	116.8
APS Equivalent	160mm	1.5x: 135mm; 1.6x: 144mm
Diagonal Angle of View (degree)	23.40	27.00
Image Circle	35mm	35mm
Focal Length (mm)	100.00	90.00
Brand	Canon	Tamron
Name	Canon EF 100mm ƒ/2.8L Macro IS USM	Tamron 90mm ƒ/2.8 Di MACRO 1:1 VC USD SP (Model F017)
Weight (g)	625	610
Aperture (f)	2.80 - 32.00	2.80 - 32.00
Diaphragm Blades	9	9
Diaphragm Blades Type	rounded	rounded
Lens Construction	15 elements in 12 groups, including 1 UD lens element	14 elements in 11 groups, including 2 XLD (Extra Low Dispersion) and 1 LD (Low Dispersion) elements; eBAND and BBAR coatings
Diameter (mm)	78	79
Focus Details	Full-time manual focus with USM; 3 position focus limiter	Internal; USD (Ultrasonic Silent Drive) with continuous manual focus mechanism