Uploaded December 2018 | Updated September 2026, 2 weeks ago

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Update Viltrox have v1.4 firmware on their website (underneath the old version look for line 2 EF-EOS M2 1.4): viltrox.com/en/index.php?m=index&a=content&cid=119

I bought the Viltrox EF-EOS M2 Speedbooster (with my own money as always, I never accept free stuff to review) so I can use my Canon M5 as a 'full frame lite' with EF lenses. First impressions are good, other than I noticed the nifty fifty Canon 50mm 1.8 STM lens no longer autoparks focus when camera is switched off !

I emailed Viltrox last night to ask about this, and they replied immediately with 1.4 firmware which fixes this, so wanted to quickly show how easy it is to update firmware and this fixes the focus autopark issue with Canon 50mm lens.

I did ask about the battery drain issue when camera is off, and they think firmware may help with that also. My M5 body doesn't drain battery with any of my lenses (EF28/50/85/24-105F4L) so this doesn't effect me thankfully.

Please comment below with any questions or feedback, I will do my best to answer as always.

Thanks for watching my video.

Auto Focus Lens Mount Adapter Ring 0.71X Focal Lenth Multiplier USB Upgrade for Canon EF Series Lens to EOS EF-M Mirrorless Camera for Canon EOS M5 M6 M50 M1 M2 M3