SpeedBooster For EOS M? That’s what the videos above and below suggests (by user ckstoa on YouTube). The video above shows an adapter taken from a box with Metabones written on. The used camera is clearly an EOS M (the AF for sure :-) ). In the video below you can clearly see the Metabones logo on the adapter. Is this a prototype undergoing testing? Metabones never mentioned the EOS M mount explicitly, they were just stating that “support for other mounts will be added in the future”.
Thanks to the reader who sent in the link.