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

Attribute	Tamron 1.4X TC-X14 ×	Nikon AF-S TC-14E III 1.4X ×
Notes	Available AF Mounts: Canon EF, Nikon F; Included Accessories: Mount cap, Rear cap, Lens case	-
Weight (g)	205	190
Type	Teleconverter	Teleconverter
Brand	Tamron	Nikon
Name	Tamron 1.4X TC-X14	Nikon AF-S TC-14E III 1.4X
Lens Construction	6 elements in 3 groups	7 elements in 4 groups
Image Circle	35mm	35mm
Magnification Ratio (x)	1.4	1.4
Diameter (mm)	70	64
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