📸 VILTROX EF-M2 II Electronic AF Auto Focus Reducer Speed Booster Lens Mount Adapter for Canon EF Mount Lens, compatible with M4/3 camera models PEN-F, GH5, GH4, GF9, GX85, E-M5, E-M10, E-M10II, E-PL3 Review

I used this on my BMPCC 4k as an alternative to another more expensive speed booster and it worked fine. I paired it with a Sigma 18-35 Art and had no problems.

It's not sharp at all, there is a blur effect! For $200 you get what you pay for, item shipped quickly but please guys you better get the meta bones, I will try to return them due to the blur.

Great if you want to save a lot of money. I needed this for my Black Magic 4K film camera. I didn't want to spend $600 on Metabons. It was the perfect alternative! Works perfectly. The only problem is that the infinite zoom has to be rotated manually, but once that was done everything worked great!

This adapter is amazing. Combined with the new GH5 focusing system, it is phenomenal in focus and quality. The ability to change aperture, find focus and zoom is what makes every Canon lens amazing. My problem is that the autofocus yaw is noticeably audible during recording. You also need to set up autofocus for the camera, not really sure if this is an adapter bug. In any case, it can be updated, so I expect a fix to come. Otherwise good value for money.

Totally soft and cannot focus to infinity. There are many videos and guides on how to "fix" this, but it never gets smooth. The mount itself also has too much play and feels cheap overall. I LOVE finding great alternatives to things, but in this case I'm going to return it and get the original. Avoid it like the plague. UPDATE: viltrox contacted me about my review and sent me an updated adapter that works with BMPCC4k. It's hard to find such customer service (very fast in our correspondence…

I am disappointed. well, in a circle. I've been in cinema for over 23 years. As a professional DOP, I mainly rent for large projects. But this time I decided to buy this for a project I had just before Christmas. I thought I might miss the chance that my local rental house didn't have a high end speed amp available. The best you can buy costs around $600-700. I couldn't justify it at the time, so I bought this one. However, I'm glad I bought it because the rental house didn't have it. So it…

I use this little speedbooster for my Blackmagic Pocket Cinema Camera 4K. I like how the crop factor went from 1.9x or 2x with the 4/3 sensor to around 1.33x with the speed booster compared to full frame. I'm used to shooting with APS-C cameras and it gives me slightly wider shots with the same lenses that aren't too different from what I'm used to. wobbles except for a very slight twisting play, which is a bit annoying when zooming/focusing with stiffer lenses, but is usually hardly noticeable