Comparison of Sigma Macro 105mm f/2.8 EX DG and Tokina 100mm f/2.8 ATX-i FF Macro

Attribute	Sigma Macro 105mm f/2.8 EX DG ×	Tokina 100mm f/2.8 ATX-i FF Macro ×
Aperture (f)	2.80 - 45.00	2.80 - 32.00
Filter Size (mm)	58	55
Notes	Available AF Mounts: Sigma, Canon, Nikon, Minolta, Pentax, Four-Thirds; Included Accessories: Lens Hood	Available AF Mounts: Canon EF Nikon F; Included Accessories: BH-551 Lens Hood
Closest Focus (m)	0.31	0.3
Magnification Ratio (x)	1	1
Type	Telephoto Prime Macro	Telephoto Prime Macro
Focus Details	Dual Focus mechanism with limiter	Extending barrel with Focus Clutch mechanism and Focus Limiter
APS Equivalent	1.5x: 157.5mm; 1.6x: 168mm	1.5x: 150mm; 1.6x: 160mm
Diaphragm Blades	8	9
Image Circle	35mm	35mm
Focal Length (mm)	105.00	100.00
Brand	Sigma	Tokina
Name	Sigma Macro 105mm f/2.8 EX DG	Tokina 100mm f/2.8 ATX-i FF Macro
Weight (g)	457	490
Diagonal Angle of View (degree)	23.30	24.50
Length (mm)	97.5	95.1
Diameter (mm)	74	73
Lens Construction	11 elements in 10 groups	9 elements in 8 groups