There are a few new Zeiss lenses coming up. They will have M42 screw mount and Nikon F mount. Unfortunately, none of them will be able to use in Leica R cameras.
The Leica R lenses mount interface is slightly anterior to the plane for the Zeiss lenses. It mean even if there is a M42 to R adapter, the lenses will be too anterior. The infinity will become more proximal. The lens will not be able to focus to infinity.
However, if you don't need focus to infinity, these lenses are great. One application is in macro work.
The Leica R lenses mount interface is slightly anterior to the plane for the Zeiss lenses. It mean even if there is a M42 to R adapter, the lenses will be too anterior. The infinity will become more proximal. The lens will not be able to focus to infinity.
However, if you don't need focus to infinity, these lenses are great. One application is in macro work.