The Abacus High Definition Stadium lens is a fast (f1.8) lens which enables ultra-wide vision shots. The angle of view is greater than 180°, the diagonal angle being a full 210°, making it possible to include a huge arc of vision on a single shot. With this type of lens, technically known as an F-theta lens, distortion in any one sector of the shot is minimal. When viewing a curved scene, such as inside a stadium, curvature is minimal even at the edges.