This ideal portrait-length prime is designed for optimal quality imaging with the most advanced Sony Full Frame mirrorless cameras. It also performs with Sony APS-C sensor models as a high speed 127.5mm equivalent AF telephoto lens.A variety of advanced lens technologies, including a Hybrid Aspherical element, allow for a more compact (< 3 inches long) and lightweight (17oz) design that also minimizes aberrations, controls distortion, and provides excellent resolution. Ultra Multi-Coating is applied to all optical surfaces to suppress flare and ghosting while increasing contrast and color accuracy.Autofocusing is fast, quiet and accomplished by two Linear Ultrasonic Motors (LSM’s) that only have to adjust a single inner lens group to achieve precise focus.Additional notable features of the new Rokinon AF 85mm F1.4 include Weather Sealing, all metal construction, an ergonomically designed size, shape and grip for enhanced comfort, and a rounded 9 blade aperture that helps to achieve beautiful bokeh.This short telephoto prime’s bright f/1.4 maximum aperture is perfect for low light shooting and offers great control over depth of field for isolating subjects and working with selective focus that is perfect for portraiture. It comes complete with a reversible lens hood, lens caps, and a soft pouch case. Rokinon Lens Stations are designed exclusively for use with Rokinon AF lenses. They allow you to connect Rokinon AF lenses to your computer and with the use of downloadable for free Rokinon Lens Manager Software you can: Update lens firmware Calibrate and customize focus parameters Calibrate and customize aperture parameters Lens User Manual Download Lens Station User Manual Download