Fujifilm 20mm F1.8 Lens Patent

Fujifilm has patented a new wide-angle lens in Japan. It is a 20mm equivalent focal length optic with a bright aperture of f/1.8.

The new wide-angle optic designed for APS-c size sensor X-mount cameras is in the works. However the patent application refers two different focal lengths. One of them is the Fujinon XF 13mm f/1.8 and the other one is the XF 20mm f/1.8.

We have to think this file to be in 13mm or the popular 14mm focal length considering the crop factor. So at this point a XF 13mm f/1.8 makes sense.

Fujifilm patent for 20mm equiv XF 13mm F1.8 lens

It seems that a new Fujinon XF 13mm f/1.8 wide-angle prime lens is in the works. Even the translation is not perfect this also explains the significant savings on the Fujinon XF 14mm F2.8 R model.


The wide-angle optic has 4 ED elements and the lens construction is made of 11 elements in 9 groups. Here are the patent details of the lens translated by machine.


  • Patent Publication No. 2016-95461
    • Published 2016.5.26
    • Filing date 2014.11.17
  • Example 1
    • Focal length 1mm
    • Bf 2.08 – 2.05 – 1.94
    • FNo 1.90 -. 1.92 – 2.00
    • Full angle of view 2ω 95.2 – 94.4 – 91.2
    • Lens configuration 9 groups 11 sheets
    • ED 4
  • Fujifilm patents
    • Negative-positive ShiboTadashi, or negative-positive Shibomake
    • Rear focus