The Samyang 85mm T1.5 AS IF UMC II VDSLR is a fast, medium telephoto lens designed for shooting high-quality video footage on a full-frame DSLR. The gearing on the focus and aperture rings allow you to follow focus and provide you with aperture control from a professional camera rig. The aperture ring has also been de-clicked, which enables smooth iris pulls. The focal distance and aperture settings are clearly marked on the side of the lens barrel for convenience. The large T1.5 aperture enables you to capture sharp images in low-light situations and also gives a beautifully blurred background.