Viltrox AF 20/2.8 & AF 28/4.5: Firmware updates (a7V support)

New firmware updates were released in December 2025 for the Viltrox AF 20/2.8 and AF 28/4.5 lenses.

The update for the Viltrox AF 28/4.5 is usual.

However, a firmware file (which you should download and copy to a virtual disk) is no longer available for the Viltrox AF 20/2.8. I had to use the Viltrox Lens application for Windows.

Fortunately, it worked.

See also related notes:

• Viltrox AF 28/4.5 (FE): Embedded profile (2026-05-13)

Image albums:

• Viltrox AF 20/2.8 FE
• Viltrox AF 28/4.5 FE