Comparison of Sigma 18-300mm f/3.5-6.3 DC Macro OS HSM Contemporary and Vivitar 28-300mm f/4-6.3 Series 1 AF

Attribute	Vivitar 28-300mm f/4-6.3 Series 1 AF ×	Sigma 18-300mm f/3.5-6.3 DC Macro OS HSM Contemporary ×
Notes	Available AF mounts: Canon, Minolta, Nikon	Image Stabilization; Available OS AF mounts: Canon EF, Nikon F, Sigma SA; Non-OS AF mounts: Sony A, Pentax K
Magnification Ratio (x)	0.18	0.33
Filter Size (mm)	77	72
Length (mm)	122	101.5
Closest Focus (m)	1.9	0.38
Diagonal Angle of View (degree)	8.20 - 75.00	5.40 - 76.50
Focus Details	AF/MF switch	Internal HSM (Hyper Sonic Motor) with AF/MF switch
Focal Length (mm)	28.00 - 300.00	18.00 - 300.00
APS Equivalent	1.5x: 42 - 450mm; 1.6x: 44.8 - 480mm	1.5x: 27 - 450mm; 1.6x: 28.8 - 480mm
Brand	Vivitar	Sigma
Image Circle	35mm	Image Circle
Name	Vivitar 28-300mm f/4-6.3 Series 1 AF	Sigma 18-300mm f/3.5-6.3 DC Macro OS HSM Contemporary
Weight (g)	570	585
Type	Standard Zoom	Standard Zoom
Aperture (f)	4.00 - 16.00	3.50 - 22.00
Diaphragm Blades	-	7
Diaphragm Blades Type	-	rounded
Lens Construction	17 elements in 15 groups	17 elements in 13 groups, including 1 SLD and 4 FLD elements; Super Multi-Layer Coating
Zoom System	Push-Pull	Rotary
Diameter (mm)	80	79