The Fujifilm teleconverter XF1.4X TC WR multiplies the focal length of mounted lenses by 1.4x*. Although the lens aperture becomes one f-stop higher when mounted, the focusing speed should be unaffected in most cases due to the contrast detection autofocus, and shooting at minimum aperture values is still possible despite the f-stop being increased by mounting the teleconverter.
Weather and dust-resistant and -10C low-temperature operation
Using the teleconverter with a weather-resistant camera and lens does not affect the weather resistance of the system.
*At the time of writing the only compatible lenses are the Fujifilm XF50-140mmF2.8 R LM OIS WR and the Fujifilm XF 100-400mm f/4.5-5.6 R LM OIS WR
Fujifilm XF1.4X TC WR Teleconverter
Compatibility Chart
| Lens | Focal length with teleconverter mounted |
|---|---|
| XF50-140mmF2.8 R LM OIS WR | 70mm-196mm |
MTF Chart of XF1.4X TC WR with XF50-140mmF2.8 R LM OIS WR
Vertical axis : Contrast S : Sagittal M : Meridional
Wide(50mm)
Spatial frequency 15 lines/mm

Distance from the center of the image
XF50-140mmF2.8 R LM OIS WR
Spatial frequency 45 lines/mm

Distance from the center of the image
XF50-140mmF2.8 R LM OIS WR

Telephoto(140mm)
Spatial frequency 15 lines/mm

Distance from the center of the image
XF50-140mmF2.8 R LM OIS WR
Spatial frequency 45 lines/mm

Distance from the center of the image
XF50-140mmF2.8 R LM OIS WR

Specifications
| Type | FUJINON TELECONVERTER XF1.4X TC WR |
|---|---|
| Lens configuration | 7 elements 3 groups |
| Focal length | 1.4x that of original lens |
| Max. aperture | 1 additional stop |
| Min. aperture | 1 additional stop |
| Focus range | Approx. same as that of original lens |
| Max. magnification | 1.4x that of original lens |
| External dimensions: Diameter x Length (distance from camera lens mount flange) | Approx. Φ58mm x 15mm |
| Weight (excluding lens caps ) | Approx.130g   |
