Can we confirm that the announced RF TCs are RF to RF? RF-RF could only be used on the 100-500mm (if new DO super tele is not released soon) and @1000mm f/14 (2x) would have few use cases. They can't fit the RF70-200 due to how close the rear element is to the mount.
If they are RF to EF TCs then it would make some sense ie to avoid RF-EF adapter + EF 1.4/2x TC and use the existing big whites. This would fit the current RF roadmap rumour but wouldn't help with future RF big whites.
If they are RF to EF TCs then it would make some sense ie to avoid RF-EF adapter + EF 1.4/2x TC and use the existing big whites. This would fit the current RF roadmap rumour but wouldn't help with future RF big whites.