Cooke S4/i are designed for use with 35mm film and full-frame digital cinema cameras and are available in a wide range of focal lengths. One of the standout features of the Cooke S4/i lenses is their "i" technology, which allows for the lens' metadata to be recorded alongside the footage. This metadata can be used to accurately reproduce the lens' characteristics in post-production, which can save time and effort when color grading and matching shots. Overall, the Cooke S4/i lenses are a popular choice among cinematographers and videographers due to their excellent image quality and convenient metadata capabilities.