Which Speedbooster for Blackmagic Pocket 4K ? Viltrox vs Metabones compared !

This is an unsponsored real life comparison between the Viltrox EF-M2 and Metabones Ultra speedboosters. Also, I tried to explain as best as I could how a speed booster works relative to crop factor if you’re interested. Please correct me if some things are unclear or if I’m wrong :) Hope you like it ! Download link for the DNG stills : Many thanks to my friends Claire and Mathieu for their time and help for this video to whom goes th