The Samyang Optics 100mm T3.1 VDSLR ED UMC Macro is a macro telephoto lens with manual focus designed for full-frame sensor sizes. The maximum close-up magnification is 1:1. This macro lens, featuring vibrant colors and smooth bokeh, is ideal for close-up shots of flowers and insects. It can also be used as a telephoto lens for landscapes and portraits. The Samyang 100mm T3.1 VDSLR ED UMC Macro allows for finer video work with T-number markings. The focus gear ring is mounted for follow-focus systems. With the decoupled aperture gears, you can change the aperture quietly and smoothly. Additionally, the distance scale and T-numbers are marked on both sides of the lens.