Viltrox EF-M2 Firmware Update 2.2 (improved autofocus) + Sigma 18-35 and the 179d autofocus test - YouTube
VILTROX EF-EOS M2 Lens Adapter 0.71x Speed Booster for Canon EF Lens t
How to UPDATE VILTROX EF-M2 speedbooster firmware - YouTube
Firmware Update Guidelines
VILTROX EF-E II F Booster Auto-Focus Focal Reducer Booster Adapter for Sony E Mount APS-C Camera & Canon EF Mount Lenses, with CDAF PDAF Switch USB firmware Update : Amazon.ca: Electronics
Adaptador de lente Canon Sony Viltrox Speed Booster | Speed Booster Canon Ef-Ef-e Ii Auto - Aliexpress
Firmware Update Viltrox EF - M2 - II Speed Booster for Blackmagic Pocket Cinema Camera 4K - YouTube
VILTROX EF-M2 II Focal Reducer Speed Booster Adapterfor Canon EF Mount
VILTROX EF-E II Auto Focus Booster Lens Adapter for Canon EF Lens to S
How to update Firmware Viltrox EF-EOS M2 Speedbooster for Canon EF-M - v1.4 fixes focus parking - YouTube
VILTROX EF-EOS M2 Lens Adapter 0.71x Speed Booster for Canon EF Lens t
Viltrox EF-Z2 Speed Booster Allows Canon EF lenses Used on Nikon Z-mou
VILTROX EF-EOS M2 Lens Adapter 0.71x Speed Booster for Canon EF Lens t
Viltrox EF-Z2 Speed Booster Allows Canon EF lenses Used on Nikon Z-mou
Viltrox EF-E II 0.71x Auto Focus Focal Reducer Speed Booster Lens Adapter (Use Canon EF Lens on Sony E Camera)
Viltrox EF-R3 Pro (Canon EF – Canon RF Speed Booster 0.71x) / SYNTEX.TV
Update Firmware on VILTROX EF-M2 II Focal Reducer Speed Booster | How To Do Viltrox Firmware Updates - YouTube