For the ones who wait for a Canon - GFX adapter:
1. A week ago I emailed Metabones and asked if they were planning to release a Canon - GFX adapter. Their answer:
"Thank you for your enquiry and interesting in our products.
Sorry to inform you that we do not have plan to release the adapter for Canon EF to Fuji GFX camera at this moment.
I am worry that the room of coverage of the Canon TS-E lenses can be reached the whole frame size of medium format.
We do not attempt to insert the lenses for enlarging the image due to the image quality is the most concern topic of our products.
Even if the coverage of TS-E is enough, we are not sure to demand for such product on the market can be covered our development cost, etc.
Anyway, we will have further study for the possibility to release the product against the GFX camera."
Their assumption about the image circle of the TS-Es is not correct. And there are lots of other full frame lenses who cover the sensor. So the people who wish for such an adapter should write to metabones too. Maybe if they know that there is demand, they rethink the decision.
2. Another company who could make a helpful product is cambo.
Cambo now announced a Canon lens panel for the WRS Series:
https://blog.cambo.com/2017/02/10/cambo-wre-ca-lens-adaptor/Works with the electronic shutter of the IQ 3100 only (because of the lack of a shutter). Clever design. Allows you to see aperture values from the right side (as opposed to the version for the Actus). The form of the panel avoids interfering with the camera.
If they just put a Fuji GFX mount on on side of their panel then we would have the first kind-of Canon-GFX adapter. Cambo seems to be the most innovative and fastest company in this segment.
Marc