Comparison of Sigma 100-400mm f/5-6.3 DG OS HSM Contemporary and Tokina 80-400mm f/4.5-5.6 AT-X 840 AF-II

Attribute	Sigma 100-400mm f/5-6.3 DG OS HSM Contemporary ×	Tokina 80-400mm f/4.5-5.6 AT-X 840 AF-II ×
Notes	Available AF Mounts: Sigma SA, Canon EF, Nikon F; Image Stabilized; Mount with dust- and splash-proof design; Compatible with Mount Converter MC-11	Available AF Mounts: Canon, Minolta, Nikon; Included Accessories: Lens Hood, Fitted Soft Case
Magnification Ratio (x)	0.26	0.19
Filter Size (mm)	67	72
Focus Details	Internal; HSM with full-time manual override	-
Closest Focus (m)	1.6	2.5
Zoom System	Push/Pull	Rotating with lock
Lens Construction	21 elements in 15 groups, including 4 SLD elements	16 elements in 10 groups, including 1 SD element
Focal Length (mm)	100.00 - 400.00	80.00 - 400.00
APS Equivalent	1.5x: 150 - 600mm; 1.6x: 160 - 640mm	1.5x: 120 - 600mm; 1.6x: 128 - 640mm
Brand	Sigma	Tokina
Image Circle	35mm	35mm
Name	Sigma 100-400mm f/5-6.3 DG OS HSM Contemporary	Tokina 80-400mm f/4.5-5.6 AT-X 840 AF-II
Weight (g)	1160	1050
Type	Telephoto Zoom	Telephoto Zoom
Aperture (f)	5.00 - 22.00	4.50 - 32.00
Diaphragm Blades	9	8
Diaphragm Blades Type	rounded	-
Length (mm)	182.3	136
Diagonal Angle of View (degree)	-	6.20 - 29.80
Diameter (mm)	86.4	77.2