18mm F2.8 AF Compact Full Frame Super Wide Angle (Sony E) Ultra Wide Angle It provides a 180° diagonal

It provides a 180° diagonal ultra-wide view with curvature  distinctive of a Fisheye  lens but allows capturing close distance sport/action shots

it features a silent iris ring for smooth iris pulls and both the focus and iris rings have built-in gears to accommodate follow focus and iris motors

a Manual / Auto Focus switch and full compatibility with APS-C Canon EF Mount Cameras

one hybrid aspherical element

In addition

18mm F2.8 AF Compact Full Frame Super Wide Angle (Sony E) Ultra Wide Angle It provides a 180° diagonalThe ROKINON AF 18mm F2. 8 Full Frame Lens for Sony E mount is optimized for portability, compactness, and ergonomic handling. It is ROKINONs fourth compact lens designed specifically for Sony mirrorless cameras which are surprisingly capable for their size. At 5. 12oz in weight and 1. 99 in length, it is the most compact, lightweight, and affordable super wide angle full frame lens for Sony E mount. The 18mm focal length provides a rectilinear 100. 1