The Samyang 35mm T1.5 Cine Lens for Canon EF with geared, manual focus and aperture control rings, is optimized for digital cinematography. The aperture ring has been "de-clicked" for smooth iris pulls, and depth of field markings provide an essential aid to focus pullers. Optically, this lens is identical to the Samyang 35mm f/1.4, which is known for its excellent sharpness, contrast and bokeh.