There's wide, then there's wide.
Ultra-wide 8mm focal length.
Clickless aperture control from T3.8 to T22.
Minimum focus distance of 0.3m.
0.8 mod pitch gears for aperture and focus control.
Available in Canon EF and Sony E mounts.
180 degree angle of view.
10 lens elements in 7 groups (1 aspherical).
6 diaphragm blades.