Comparison of Canon Extender EF 2x III and Nikon AF-S TC-20E III 2X

Attribute	Canon Extender EF 2x III ×	Nikon AF-S TC-20E III 2X ×
Notes	-	Designed for use with AF-S and AF-I Nikkor lenses. See Description tab for compatibility.
Weight (g)	325	330
Type	Teleconverter	Teleconverter
Brand	Canon	Nikon
Name	Canon Extender EF 2x III	Nikon AF-S TC-20E III 2X
Lens Construction	9 elements in 5 groups	7 elements in 5 groups (with 1 aspherical element)
Image Circle	35mm	35mm
Magnification Ratio (x)	2	2
Diameter (mm)	72	66
Focal Length Multiplier	2X that of the master lens	2X that of the master lens
Effective Reduction in Aperture	2 f-stops	2 f-stops
Length (mm)	52.7	46