Comparison of Nikon 400mm f/2.8G IF-ED AF-S VR Nikkor and Tamron SP AF 300mm f/2.8 LD IF

Attribute	Nikon 400mm f/2.8G IF-ED AF-S VR Nikkor ×	Tamron SP AF 300mm f/2.8 LD IF ×
Notes	Image Stabilization	Available AF Mounts: Canon, Minolta, Nikon; Included Accessories: Lens Hood, Case
Magnification Ratio (x)	0.16	0.141
Filter Size (mm)	52	43
Length (mm)	368	215.9
Closest Focus (m)	2.9	2.5
Diagonal Angle of View (degree)	6.20	8.00
Focus Details	Internal; Silent Wave Motor; M/A switch	Internal; Focus ring slides back and forth to switch between AF and MF
Focal Length (mm)	400.00	300.00
APS Equivalent	600mm	1.5x: 450mm; 1.6x: 480mm
Brand	Nikon	Tamron
Image Circle	35mm	35mm
Name	Nikon 400mm f/2.8G IF-ED AF-S VR Nikkor	Tamron SP AF 300mm f/2.8 LD IF
Weight (g)	4620	2800
Type	Telephoto Prime	Telephoto Prime
Aperture (f)	2.80 - 22.00	2.80 - 32.00
Diaphragm Blades	9	9
Diaphragm Blades Type	rounded	-
Lens Construction	14 elements in 11 groups, including 3 ED glass elements, one Nano Crystal Coat and one meniscus protective glass element	10 elements in 7 groups, including 2 LD elements
Zoom System	n/a	-
Diameter (mm)	159.5	120