Comparison of Sigma 18-200mm f/3.5-6.3 DC and Tamron 18-200mm f/3.5-6.3 Di II VC

Attribute	Tamron 18-200mm f/3.5-6.3 Di II VC ×	Sigma 18-200mm f/3.5-6.3 DC ×
Aperture (f)	3.50 - 40.00	3.50 - 22.00
Filter Size (mm)	62	62
Notes	Available lens mounts: Canon EF-S, Nikon F (AF-S), Sony A. VC (Vibration Compensation) Image Stabilization for Canon and Nikon mounts.	Available AF Mounts: Sigma, Canon, Nikon, Nikon (HSM), Minolta/Sony, Pentax, Four-Thirds
Closest Focus (m)	0.49	0.45
Magnification Ratio (x)	0.25	0.23
Diameter (mm)	75	70
Type	Standard Zoom	Standard Zoom
APS Equivalent	1.5x: 27 - 300mm; 1.6x: 28.8 - 320mm	1.5x: 27 - 300mm; 1.6x: 28.8 - 320mm
Diaphragm Blades	7	7
Image Circle	APS-C	Image Circle
Focal Length (mm)	18.00 - 200.00	18.00 - 200.00
Brand	Tamron	Sigma
Name	Tamron 18-200mm f/3.5-6.3 Di II VC	Sigma 18-200mm f/3.5-6.3 DC
Weight (g)	400	405
Diagonal Angle of View (degree)	8.00 - 75.50	7.10 - 69.30
Lens Construction	16 elements in 14 groups, including 1 LD (Low Dispersion) element	15 elements in 13 groups, including two aspherical elements and two Special Low Dispersion (SLD) lenses
Zoom System	Rotary (with zoom lock)	Rotary
Length (mm)	96.6	78.1
Diaphragm Blades Type	rounded	-
Focus Details	Internal; Newly designed autofocus drive module with optimal DC motor-gear train; AF/MF switch	Internal, fixed lens length during focusing