According to a rumor from earlier this month, it was suggested that Canon could be working on a new professional EOS R camera that could feature a hybrid EF/RF mount. Now according to a report from Canon Watch, it seems that another possible rumored feature of the camera is a “moving sensor”.
The report claims that this moving sensor is what will help make the hybrid mounting system works. This is due to the fact that EF and RF lenses are made differently. By using a moving sensor, it can help to move the sensor back and forth to adjust for the flange distance between the two lens types.
This means that if you switch from an RF lens to an EF lens, the sensor will move and adapt accordingly so that your photos come out right, and vice versa. Canon Watch suggests that this is probably the most likely approach and also probably the most feasible in terms of engineering.
Of course, there’s no way to confirm if this is true so it’s probably best taken with a grain of salt, but if it is true, then Canon could have something truly unique on their hands. That being said, this particular camera is only expected to arrive in 2020 at the earliest, so we will have to wait and see for ourselves.