Viltrox AF 20/2.8: Firmware update (V1.1.2)

As mentioned before, I have only two electronic (AF) lenses with Sony FE/E mount: the Samyang AF 35/2.8 and the Viltrox AF 20/2.8.

It is not possible to update their firmware directly with a Sony camera.

To update the Samyang firmware, you need a docking station (or find someone who has one). So I am still using the outdated v.04 firmware (while v.08 is available).

Meanwhile, the Viltrox AF 20/2.8 has the USB-C port on the mount flange.

And the firmware can be updated by copying the file to a virtual disk. A nice solution.

The lens information on my Sony a7c shows version 01:

The real version information from the virtual DeviceInformation.txt file:

My lens already has the current firmware version V1.1.2 installed.

See also related notes:

• Samyang AF 35/2.8: Lens station (2025-05-15)
• Viltrox AF 28/4.5: Firmware update (2025-02-19)

Image albums:

• Viltrox AF 20/2.8 FE