Comparison of Fujinon GF 1.4X TC WR and Tamron 2X TC-X20

Attribute	Fujinon GF 1.4X TC WR ×	Tamron 2X TC-X20 ×
Type	Teleconverter	Teleconverter
Name	Fujinon GF 1.4X TC WR	Tamron 2X TC-X20
Weight (g)	400	360
Image Circle	Medium Format (Fujifilm G-mount)	35mm
Brand	Fujinon	Tamron
Magnification Ratio (x)	1.4	2
Lens Construction	7 elements in 3 groups	9 elements in 5 groups, including 1 Low Dispersion element
Notes	For Fujifilm G-mount; Weather- and Dust-resistant; Included Accessories: Lens cap, Lens rear cap RLCP-002, Lens pouch.	Available AF Mounts: Canon EF, Nikon F; Included Accessories: Mount cap, Rear cap, Lens case
Diameter (mm)	82	69.8
Focal Length Multiplier	1.4X that of the master lens	2X that of the master lens
Effective Reduction in Aperture	1 f-stop	2 f-stops
Length (mm)	26.7	53.6