Comparison of Nikon 18-35mm f/3.5-4.5D ED-IF AF Nikkor and Tamron AF 19-35mm f/3.5-4.5

Attribute	Nikon 18-35mm f/3.5-4.5D ED-IF AF Nikkor ×	Tamron AF 19-35mm f/3.5-4.5 ×
Filter Size (mm)	77	77
Notes	Included Accessories: HB-23 Hood	Available AF Mounts: Canon, Minolta, Nikon
Closest Focus (m)	0.33	0.5
Magnification Ratio (x)	0.15	0.08
Type	Wide Zoom	Wide Zoom
Length (mm)	84	67.7
APS Equivalent	27 - 52mm	1.5x: 28.5 - 52.5mm; 1.6x: 30.4 - 56mm
Zoom System	Rotary	Rotary
Image Circle	35mm	35mm
Focal Length (mm)	18.00 - 35.00	19.00 - 35.00
Brand	Nikon	Tamron
Name	Nikon 18-35mm f/3.5-4.5D ED-IF AF Nikkor	Tamron AF 19-35mm f/3.5-4.5
Weight (g)	369	317
Aperture (f)	3.50 - 22.00	3.50 - 22.00
Diaphragm Blades	7	8
Diagonal Angle of View (degree)	62.00 - 100.00	63.00 - 97.00
Lens Construction	11 elements in 8 groups, including 1 aspherical and 1 ED element	13 elements in 11 groups
Diameter (mm)	81	83.2
Focus Details	Internal	Internal