Comparison of Canon Extender EF 2x III and Fujinon GF 1.4X TC WR

Attribute	Canon Extender EF 2x III ×	Fujinon GF 1.4X TC WR ×
Notes	-	For Fujifilm G-mount; Weather- and Dust-resistant; Included Accessories: Lens cap, Lens rear cap RLCP-002, Lens pouch.
Weight (g)	325	400
Type	Teleconverter	Teleconverter
Brand	Canon	Fujinon
Name	Canon Extender EF 2x III	Fujinon GF 1.4X TC WR
Lens Construction	9 elements in 5 groups	7 elements in 3 groups
Image Circle	35mm	Medium Format (Fujifilm G-mount)
Magnification Ratio (x)	2	1.4
Diameter (mm)	72	82
Focal Length Multiplier	2X that of the master lens	1.4X that of the master lens
Effective Reduction in Aperture	2 f-stops	1 f-stop
Length (mm)	52.7	26.7