The Samyang 35mm T1.5 AS IF UMC has been designed to work with reflex cameras of most well known brands, equipped with full-frame or APS-C sensors. VDSLR Samyang lenses are fitted with racks compatible with the Follow Focus system. This solution allows for effortless and accurate rotation of focus and aperture rings. The aperture ring is rotated smoothly and noiselessly. These modifications allow for extremely comfortable and effective control of focal plane and depth of field during filming. Optical construction of the lens is based on 12 elements arranged in 10 groups. The lens comprises one aspherical lens element and two elements made of glass with a high refraction factor. High-quality multi-layered anti-reflection coatings ensure high contrast and accurate colour reproduction. The product is also fitted with the system of gliding lenses to maintain high image quality at the minimum focusing distance. Brightness of the lens corresponds with the T-number of 1.5. To facilitate the reading on the focus and aperture scale, both these indexes are marked in a parallel position to the optical axis of the lens.