With a wide angle of view of 21mm and 3 aspherical glass lenses, it provides the opportunity to experience the depth and breadth of the image. Samyang 21mm T1.5 can be used for various purposes, especially for portraits. Samyang 21mm T1.5 ED AS UMC CS allows for finer video work with T-number markings. The focus ring gear is mounted for the following focus system. With the uncoupled aperture ring gear, you can change the aperture quietly and smoothly. Furthermore, distance scale and T-numbers are marked on both sides of the lens.