Comparison of Sigma 18-300mm f/3.5-6.3 DC Macro OS HSM Contemporary and Tamron 16-300mm f/3.5-6.3 Di II VC PZD Macro (Model B016)

Attribute	Sigma 18-300mm f/3.5-6.3 DC Macro OS HSM Contemporary ×	Tamron 16-300mm f/3.5-6.3 Di II VC PZD Macro (Model B016) ×
Aperture (f)	3.50 - 22.00	3.50 - 40.00
Filter Size (mm)	72	67
Notes	Image Stabilization; Available OS AF mounts: Canon EF, Nikon F, Sigma SA; Non-OS AF mounts: Sony A, Pentax K	Includes flower-shaped lens hood. Available AF mounts: Canon EF-S, Nikon F, Sony A; VC Image Stabilization; Sony version does not include VC.
Closest Focus (m)	0.38	0.39
Magnification Ratio (x)	0.33	0.34
Zoom System	Rotary	Rotary
Type	Standard Zoom	Standard Zoom
APS Equivalent	1.5x: 27 - 450mm; 1.6x: 28.8 - 480mm	1.5x: 24 - 450mm 1.6x: 25.6 - 480mm
Diaphragm Blades	7	7
Image Circle	Image Circle	APS-C
Focal Length (mm)	18.00 - 300.00	16.00 - 300.00
Brand	Sigma	Tamron
Name	Sigma 18-300mm f/3.5-6.3 DC Macro OS HSM Contemporary	Tamron 16-300mm f/3.5-6.3 Di II VC PZD Macro (Model B016)
Weight (g)	585	540
Diaphragm Blades Type	rounded	rounded
Lens Construction	17 elements in 13 groups, including 1 SLD and 4 FLD elements; Super Multi-Layer Coating	16 elements in 12 groups including 1 Hybrid Aspherical, two LD (Low Dispersion), 1 XR (Extra Refractive index), 1 UXR (Ultra-Extra Refractive Index)
Diagonal Angle of View (degree)	5.40 - 76.50	5.30 - 82.20
Length (mm)	101.5	99.5
Diameter (mm)	79	75
Focus Details	Internal HSM (Hyper Sonic Motor) with AF/MF switch	Internal with Piezo Drive motor; Full-time manual focus function