This particular lens comes with auto focus to help you take that perfect picture. It is of the fish-eye type.
From Photospecialist
Venus LAOWA 4mm f / 2.8 Circular Fisheye voor Sony E
CVP
Laowa 4mm f/2.8 Fisheye - Sony E
WEX Photo Video
Laowa 4mm f2.8 Circular Fisheye Lens for Sony E