Samyang 135mm T2.2 VDSLR ED UMC is a manual focus lens with a low T number. You may control the lens precisely when shooting under various exposure environment including relatively dark or too bright situations. This lens features 11 lenses in 7 groups especially including extra low dispersion lens (ED) to offer high resolution throughout the image. Ultra Multi Coating(UMC) of Samyang Optics is used to optimize the light penetration and minimizes flare and ghost. With such optical construction, it has 0.8m of minimum focal length to film subjects in near distance. Also, the floating type design secures as much light as possible and maximizes the resolution by minimizing spherical aberration and distortion.