Viltrox released firmware updates for its 56mm, 33mm, and 23mm lenses for X-mount Firmware update instructions: 1. Fixed the problem of abnormal aperture in some specific situations. 2. Optimize the focus performance. AF 56/1.4 XF V1.1.3  Firmware Download AF 33/1.4 XF V1.1.3  Firmware Download AF 23/1.4 XF V1.1.3  Firmware Download VILTROX 23mm f/1.4: B&H Photo / Amazon VILTROX 33mm f/1.4: B&H … Continue reading Viltrox AF 23mm f/1.4, 33mm f/1.4, and 56mm f/1.4 Firmware 1.1.3 Update Released