Extensions Tube for RF 16mm 2.8

[Corundum]

Does anyone know if third party extension tubes will work with the RF 16mm 2.8?  I'm guessing the widest ones won't work but I was wondering about something like a 10mm or 11mm tube?  Would the lens still be able to focus?

[p4pictures]

It’s very likely that the point of focus would be inside the lens not in front of it if you used an extension tube.

So far Canon has not introduced extension tubes for the RF mount so I am not sure how the camera and lens corrections would work if they were used.