According to latest rumors on CR, Canon may announce a new EOS R Pro mirrorless camera in 2020 with both RF mount and EF mount. This means you can use both RF lenses and EF lenses without a lens adapter on this camera.
This camera was being developed for the “EOS-1 style EOS R camera”, which would make a lot of sense. The size for this EOS R Pro mirrorless camera is not all that important.
via: CR
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