Comparison of Sigma APO 300mm ƒ/2.8 EX DG HSM and Tokina 300mm f/2.8 AT-X 300 AF PRO

Attribute	Sigma APO 300mm ƒ/2.8 EX DG HSM ×	Tokina 300mm f/2.8 AT-X 300 AF PRO ×
Notes	Available AF Mounts: [HSM version]: Sigma, Canon, Nikon; [w/o HSM]: Minolta, Pentax	Available AF Mounts: Canon, Minolta, Nikon; Included Accessories: Lens Hood, Fitted Soft Case
Magnification Ratio (x)	0.13	-
Filter Size (mm)	46	112
Focus Details	Internal; HSM with full-time manual override	Internal
Closest Focus (m)	2.5	2.4
Lens Construction	11 elements in 9 groups, including 2 ELD elements	9 elements in 7 groups, including 2 SD elements
Length (mm)	214.5	187
Focal Length (mm)	300.00	300.00
APS Equivalent	1.5x: 450mm; 1.6x: 480mm	1.5x: 450mm; 1.6x: 480mm
Brand	Sigma	Tokina
Image Circle	35mm	35mm
Name	Sigma APO 300mm ƒ/2.8 EX DG HSM	Tokina 300mm f/2.8 AT-X 300 AF PRO
Weight (g)	2400	2300
Type	Telephoto Prime	Telephoto Prime
Aperture (f)	2.80 - 32.00	2.80 - 32.00
Diaphragm Blades	9	9
Diagonal Angle of View (degree)	8.20	8.20
Diameter (mm)	119	117