Rokinon CINE DS Lens kit features a high-speed maximum aperture of T1.5 and an eight blade iris for shallow depth of field with attractive bokeh. The focus and aperture control rings are outfitted with industry-standard gearing, which provides an interface for working with a traditional follow focus. The aperture control ring has also been “de-clicked,” which facilitates smooth iris pulls. With full-frame coverage, fast apertures, and optical designs, DS lenses support the increased capabilities of the latest DSLR, Mirrorless, Cine camera systems, and drones. Internal focusing minimizes the effects of lens breathing, which insures a more consistent angle-of-view when adjusting focus. The lens is composed of 9 elements in 7 groups, including one aspherical element to reduce spherical aberrations. In addition, a multi-coated elements help improve light transmission.