The 18mm S4/i T2 Prime Lens from Cooke features optimal optical performance, /i Technology lens data transfer, and an ergonomic mechanical design with smooth cam-based focus adjustments. This 18mm lens incorporates an aperture range of T2.0 to T22, focus scales marked in both feet and meters, and color matching with other modern Cooke cine-style lenses. The S4/i lenses minimize flare, distortion, veiling glare, and spherical aberrations even at the full aperture setting. The S4/i lenses are PL-mounted, making them compatible with most professional cine-style cameras.