Comparison of Sigma 24-70mm f/2.8 DG DN Art and Tokina 28-80mm f/2.8 AT-X 280 AF PRO

Attribute	Sigma 24-70mm f/2.8 DG DN Art ×	Tokina 28-80mm f/2.8 AT-X 280 AF PRO ×
Notes	Available AF Mounts: L-Mount, E-Mount; Mount with dust- and splash-proof design	Available AF Mounts: Canon, Minolta, Nikon, Pentax; Included Accessories: Lens Hood, Fitted Soft Case
Magnification Ratio (x)	0.34	0.2
Filter Size (mm)	82	77
Length (mm)	122.9	120
Closest Focus (m)	0.18	0.5
Diagonal Angle of View (degree)	34.30 - 84.10	30.30 - 75.30
Focus Details	Internal focus with stepping motor; AF/MF switch; AFL button	Internal with Focus Clutch mechanism
Focal Length (mm)	24.00 - 70.00	28.00 - 80.00
APS Equivalent	36 - 105mm	1.5x: 42 - 120mm; 1.6x: 44.8 - 128mm
Brand	Sigma	Tokina
Image Circle	35mm	35mm
Name	Sigma 24-70mm f/2.8 DG DN Art	Tokina 28-80mm f/2.8 AT-X 280 AF PRO
Weight (g)	835	819
Type	Standard Zoom	Standard Zoom
Aperture (f)	2.80 - 22.00	2.80 - 22.00
Diaphragm Blades	11	9
Diaphragm Blades Type	rounded	-
Lens Construction	19 elements in 15 groups, including 6 FLD, 2 SLD and 3 aspherical elements; Super Multi-Layer Coating, Nano Porous Coating.	16 elements in 12 groups, including 2 aspherical and 1 SD elements
Zoom System	Rotary (with zoom lock)	Rotary
Diameter (mm)	87.8	84