DZO Pictor Zoom 20 to 55mm T2.8 Super35 Parfocal Zoom Lens features a relatively fast maximum aperture of T2.8 with an aperture range of T2.8 to T22. As you would expect from a cinema-style zoom, the lens is parfocal, meaning it holds focus throughout the zoom range. The internal focus design with floating elements virtually eliminates focus breathing. It covers a Super35 image circle, comes standard with an interchangeable PL mount, and includes an EF mount. Compatible with a wide range of digital cinema cameras. The lenses hold focus throughout the focal length range and feature matching 16-blade irises for producing round out-of-focus highlights. This bundle includes a durable protective case for transport and storage.