According to Chinese website xjrumo, First electronic autofocus adapter for Nikon F-mount to Sony E-mount will be announced soon. A Chinese company current is working on a new Nikon F to Sony E-mount adapter with electronic autofocus.
For Canon EF-mount to Sony E-mount, Canon lens users can use Metabones Lens adapter.
According to the source, this Nikon to Sony lens adapter is in final testing, it will be announced soon. Stay tuned for more info.
Read More: Sony Alpha Rumors