According to the Linos chart on this lens and the schematics, it seems there is a good inch of space between the very rear of the lens to the sensor plane. I don't know if that's enough to clear the A7r throat and to have a few degrees of tilt. without tilt, I don't se much reason to use this lens. Rodenstock states it is a f5.6 lens only and suggests using tilts for dof control.
Taking this advice from Rodenstock at face value is throwing a way a LOT of practical use of this lens.
When you ask a lens manufacturer what aperture they suggest a lens be used at their answer will be based 99% on the optical quality as measured in the lab (flat subject matter, incredibly precise focus, zero user error).
In practice using this lens only
at f/5.6 is ignoring the incredibly
good images you can get at f/8 or f/11 or even f/16. Will an image shot at [email protected]
/5.6 be sharper in the plane of focus than the somewhat diffracted results you'll get at [email protected]
/16? Sure. But the later image will still be very sharp and contain lots of real world detail, and will also have the DOF and wiggle-room-for-misfocus that benefit real world image making. The difference in sharpness between f/5.6 and f/8 in particular is going to be exceedingly small to the point of being barely worth mentioning for most practical image making.