Cinema5D took a look on this quite unusual camera:
The Yongnuo YN450 is a smart mirrorless camera with Android operating system and a 16MP micro four thirds image sensor. It features a Canon EF mount, a 5″ multi-touch 1080p display, as well as a 4G SIM card slot for instant content sharing.
Yongnuo decided to equip their camera with the Canon EF lens mount, which might have to do with Yongnuo’s lens portfolio, which is based on Canon EF mount (and Nikon F mount). However, that mount makes the whole camera-lens combination very bulky and actually prevents one from being able to use more compact micro four thirds lenses, which would be a better match for the sensor, in my opinion.