Viltrox EF-GFX Lens Mount Adapter for Canon EF or EF-S-Mount Lens to FUJIFILM G-Mount GFX Camera

Yes, it supports electronic communication between camera and lens to enable autofocus when possible.

Yes. The following unit allow a Canon EF or EF-S-mount lens to be used with a FUJIFILM G-mount GFX camera with full electronic communication and metering.

There will be some degree of additional coverage past the 24mm x 36mm area this lens is designed to cover. Image quality will degrade quickly in this extra area and there will be significant light fall off. Not an ideal solution.

At the time of writing, the GFX100S has not been officially released, not has the GFX100s has not been comprehensively tested by Viltrox for compatibility. It is in our estimates that this should work without issue or at most with a firmware update through the adapter's micro-USB port.