This 257g(9.0oz) superlight lens incorporates Samyang's optical technology accumulated more than 50 years. It provides excellent resolving power that covers the high-resolution sensors of the latest cameras with an incredibly compact medium-telephoto lens. Along with the outstanding optical performance that can clearly capture 4K as well as 6K, Samyang's unique new feature 'Preset Aperture Control' function allows you the smooth depth of field expression when shooting videos.