This is a a manual full frame 12mm fisheye lens with stereographic projection geometry and a 180 degree FOV.
It reaches excellent overall sharpness at f/4.
Perfect for landscape-, architecture- and astrophotography or VFX applications. You can e.g. capture a light probe with just two shots.

diameter: 77 mm
length: 70 mm
weight: 399g

Review with more data:

Replacement Value: 460
Brand: Samyang
Model: 12mm f/2.8 for Sony-E
Samyang 12 mm f/2.8–f/22 Fisheye for Sony-E
€30 per day