Comparison of Sigma 18-200mm f/3.5-6.3 DC and Vivitar 28-210mm f/4.2-6.5 Series 1 AF

Attribute	Vivitar 28-210mm f/4.2-6.5 Series 1 AF ×	Sigma 18-200mm f/3.5-6.3 DC ×
Magnification Ratio (x)	0.15	0.23
Filter Size (mm)	67	62
Focus Details	AF/MF switch	Internal, fixed lens length during focusing
Closest Focus (m)	0.5	0.45
Lens Construction	15 elements in 13 groups	15 elements in 13 groups, including two aspherical elements and two Special Low Dispersion (SLD) lenses
Length (mm)	99	78.1
Focal Length (mm)	28.00 - 200.00	18.00 - 200.00
Diagonal Angle of View (degree)	11.00 - 75.00	7.10 - 69.30
Brand	Vivitar	Sigma
Image Circle	35mm	Image Circle
Name	Vivitar 28-210mm f/4.2-6.5 Series 1 AF	Sigma 18-200mm f/3.5-6.3 DC
Weight (g)	395	405
Type	Standard Zoom	Standard Zoom
Notes	Available AF mounts: Canon, Minolta, Nikon, Pentax	Available AF Mounts: Sigma, Canon, Nikon, Nikon (HSM), Minolta/Sony, Pentax, Four-Thirds
APS Equivalent	1.5x: 42 - 315mm; 1.6x: 44.8 - 336mm	1.5x: 27 - 300mm; 1.6x: 28.8 - 320mm
Aperture (f)	4.20 - 22.00	3.50 - 22.00
Diaphragm Blades	-	7
Zoom System	Push-Pull	Rotary
Diameter (mm)	72	70