How to UPDATE VILTROX EF-M2 speedbooster firmware - YouTube
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
Firmware Update Guidelines
Viltrox EF-FX2 Auto Focus Lens Adapter for Canon EF Mount Lens to Fuji
VILTROX EF-EOS M2 Lens Adapter 0.71x Speed Booster for Canon EF Lens t
Viltrox EF-FX2 Auto Focus Lens Adapter for Canon EF Mount Lens to Fuji
Viltrox EF-Z2 Speed Booster Allows Canon EF lenses Used on Nikon Z-mou
Viltrox EF-GFX PRO and EF-GFX Firmware Updates - Fuji Rumors
Firmware Update Guidelines
Viltrox Canon M50 Adapter | Canon M50 Speed Booster | Ef Lens Adapter Mount - Ef-eos M2 - Aliexpress
VILTROX EF-M1 Auto Focus Exif Lens Adapter for Canon EOS EF EF-S Lens
Firmware Update Guidelines
Viltrox Canon EOS M adattatore per obiettivo messa a fuoco automatica 0.71x riduttore focale Speed Booster per fotocamera Canon EF to M M6 M200 M50 M5 - AliExpress