Comparison of Sigma 18-200mm ƒ/3.5-6.3 DC OS and Tokina 24-200mm f/3.5-5.6 AT-X 242 AF

Attribute	Sigma 18-200mm ƒ/3.5-6.3 DC OS ×	Tokina 24-200mm f/3.5-5.6 AT-X 242 AF ×
Filter Size (mm)	72	72
Notes	Image Stabilization; Available AF mounts: Sigma, Canon, Nikon (HSM); Includes petal-type lens hood.	Available AF Mounts: Canon, Minolta, Nikon, Pentax; Included Accessories: Lens Hood, Fitted Soft Case
Closest Focus (m)	0.45	0.8
Magnification Ratio (x)	0.26	0.17
Type	Standard Zoom	Telephoto Zoom
Length (mm)	100	89
APS Equivalent	1.5x: 27 - 300mm; 1.6x: 28.8 - 320mm	1.5x: 36 - 300mm; 1.6x: 38.4 - 320mm
Zoom System	Rotary	Rotary
Image Circle	Image Circle	35mm
Focal Length (mm)	18.00 - 200.00	24.00 - 200.00
Brand	Sigma	Tokina
Name	Sigma 18-200mm ƒ/3.5-6.3 DC OS	Tokina 24-200mm f/3.5-5.6 AT-X 242 AF
Weight (g)	610	690
Aperture (f)	3.50 - 22.00	3.50 - 22.00
Diaphragm Blades	7	6
Diagonal Angle of View (degree)	7.10 - 69.30	12.30 - 84.20
Lens Construction	18 elements in 13 groups, including 3 SLD and 2 aspherical elements	15 elements in 13 groups, including 2 aspherical and 2 SD elements
Diameter (mm)	79	81.8
Focus Details	Internal with AF/MF switch	Internal