GF1.4X TC WR是适用于G卡口镜头的1.4倍望远增倍镜。 在 GF250MF4 R LM OIS WR镜头上安装望远增倍镜后，可以实现350mm焦距（大约相当于35mm格式的277mm）望远焦段，而且图像质量依然出色。 较大光圈减小一个F值。 由于镜头和望远增倍镜都具备优异品质，因此在安装望远增倍镜后，MTF曲线几乎没有变化。
Vertical axis : Contrast
Horizontal axis : Distance from the center of the image
S : Sagittal
M : Meridional
| Type | FUJINON TELECONVERTER GF1.4X 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*1 (approx.) | φ82mm x 26.7mm |
| Weight*2 (approx.) | 400g |
| Accessories included | Lens cap |
| Lens rear cap RLCP-002 | |
| Lens pouch |