Viltrox released firmware updates for the Viltrox AF 50mm f/1.8, 35mm f/1.8, and 24mm f/1.8 that optimize compatibility with the a7IV. AF 50/1.8 FE V1.0.6  Firmware Download Firmware update instructions: 1. Optimize compatibility with a7m4. 2. Optimize the stability of video focusing for long-time work. AF 35/1.8 FE V1.0.5  Firmware Download Firmware update instructions: 1. … Continue reading Viltrox AF 50mm f/1.8, 35mm f/1.8, and 24mm f/1.8 Firmware Updates Released