Comparison of Nikon AF-S TC-14E II 1.4X and Tamron 1.4X TC-X14

Attribute	Tamron 1.4X TC-X14 ×	Nikon AF-S TC-14E II 1.4X ×
Type	Teleconverter	Teleconverter
Name	Tamron 1.4X TC-X14	Nikon AF-S TC-14E II 1.4X
Weight (g)	205	200
Image Circle	35mm	35mm
Brand	Tamron	Nikon
Magnification Ratio (x)	1.4	1.4
Lens Construction	6 elements in 3 groups	5 elements in 5 groups
Notes	Available AF Mounts: Canon EF, Nikon F; Included Accessories: Mount cap, Rear cap, Lens case	Compatible with AF-S and AF-I Nikkor lenses except AF-S 17-35mm f/2.8D IF-ED and AF-S 28-70mm f/2.8D IF-ED.
Diameter (mm)	70	66
Focal Length Multiplier	1.4X that of the master lens	1.4X that of the master lens
Effective Reduction in Aperture	1 f-stop	1 f-stop
Length (mm)	21.4	24.5