Hybrid glass aspherical lens (H-ASP)- Glass aspherical lens (ASP)- High-refractive, extra low dispersion lens (HR ED)- Uncoupled aperture and focus gear ring- VDSLR II CINE LENS- Circular with 6 blades Wide Angle Manual Focus Cine Lens Samyang Optics 14mm T3.1 VDSLR ED AS IF UMC II is a wide angle manual focus cine lens designed for full frame sensor sizes. Cine Lens Features Samyang 14mm T3.1 DSLR ED AS IF UMC II is carefully designed for professional film and video works so the focus gear ring is installed for follow focus system. You may change the aperture quietly and smoothly with the uncoupled aperture gear ring. The T number guiding the actual amount of light transmission and distance scales are marked on both sides of the lens to film much precisely. The lens operates in manual aperture system with low T number which enables natural shooting under various light exposure circumstances. Optical Features This lens features 14 lenses in 10 groups including 3 high-refractive and extra low dispersion lenses (HR ED), 1 hybrid aspherical lens (H-ASP) and 1 glass aspherical lens (ASP). H-ASP and ASP lenses minimize color aberration to realize exceptional image quality and high contrast for center and corner of image even when aperture is fully opened. HR ED lens of 14mm T3.1 VDSLR ED AS IF UMC II effectively controls the light dispersion to prevent flare and ghost. Ultra Multi Coating (UMC) technology of Samyang Optics optimizes the light penetration to also minimize flare and ghost.