High image quality design which maintains the optical performance of the original lens
Construction of 9 elements in 5 groups maintains the optical performance of the original lens.
By using the optimal image quality parameters for the overall characteristics of the original lens and 2x teleconverter, excellent imaging performance with great aberration suppression is still achieved.
The aperture becomes two f-stops higher when the teleconverter is mounted, and the camera displays and records information reflecting the change in aperture and focal length.

Great autofocus performance is stilll available
Phase detection AF is still available when using the XF50-140mmF2.8 R LM OIS WR with the 2x teleconverter mounted.
Contrast Detection AF is still available when using the XF100-400mmF4.5-5.6 R LM OIS WR with the 2x teleconverter mounted.
Accurate focusing at super-telephoto focal lengths with shallow depth of field is possible thanks to the AF performed by the image sensor, thanks to the ‘Live View’ feature on the cameras.

Weather and dust-resistant and -10°C low-temperature operation
The converter is weather and dust-resistant and operates at temperatures as low as -10°C meaning you can confidently use the teleconverter outdoors

Tough build quality. Subtle appearance.
The teleconverter’s high grade metal exterior has been designed with the X system in mind. When attached to a compatible FUJINON lens, the two products appear as one single lens.