Firmware download

 

Click and download:

AF 25mm f1.8 Fireware VER 1.08 for X mount Fujifilm Cameras

AF 25mm f1.8 Firmware VER.10 for E mount Sony Cameras

 

Upgrade steps:

1) Download it to your computer;

2) link your lens to your computer through the USB-C port on its side, and it should show on your computer as "SG-image"; 

3) Copy and paste the firmware from your computer to your lens, and that's it. 

There is a txt file on the lens which shows the firmware version and its release date. It should show the firmware version you upgraded it to.