The Fujinon XF1.4X TC WR is a high-performance teleconverter capable of multiplying the focal length of compatible lenses by 1.4x. When mounted, the teleconverter increases the lens’ aperture by one f-stop, however its sophisticated optical design constructed of 7 elements in 3 groups maintains the optical performance of the original lens. Additionally, thanks to the unified design when mounted to a compatible lens, the teleconverter is weather and dust-resistant and operates at temperatures as low as -10°C.
High image quality design which maintains the optical performance of the original lens
The teleconverter’s construction of 7 elements in 3 groups maintains the optical performance of the original lens. By using the optimum image quality parameters for the overall characteristics of the original lens and 1.4x teleconverter, an excellent imaging performance with great aberration suppression can be achieved even when the focal length is multiplied by 1.4x.
The camera displays and records information reflecting the change in aperture and focal length when the teleconverter is mounted.
Autofocus performance is unaffected by the addition of the teleconverter
Weather and dust-resistant and -10°C low-temperature operation
An AF speed equivalent to that of the lens by itself is still achieved when the teleconverter is mounted. Thanks to mirrorless cameras’ Live View Contrast Detection autofocus, shooting at minimum aperture values is still possible despite the f-stop being increased by mounting the teleconverter. Also, accurate focusing at super-telephoto focal lengths with shallow depth of field is possible thanks to the AF performed by the image sensor.
Using the teleconverter with a weather-resistant camera and lens, such as the "FUJIFILM X-T1" premium mirrorless camera and the "FUJINON Lens XF50-140mmF2.8 R LM OIS WR", does not affect the weather resistance of the system.