The 85mm f/1.4 Lens for Sony A Mount from Rokinon is a manual focus, manual aperture, telephoto prime lens compatible with full frame and APS-C format Sony NEX mirrorless digital cameras. On APS-C format cameras it provides a 35mm format focal length equivalency of 127.5mm. It is ideal for portraiture and other telephoto applications. Its bright f/1.4 maximum aperture is very effective in low light situations and provides shallow depth of field focus control. An aspherical lens element aids in the reduction of aberrations and UMC multi-layer coating minimizes flare and ghosting and contributes to overall sharp imaging. The lens offers a minimum focus distance of 3.3', its filter thread diameter is 72mm and included with the lens is a bayonet-type lens hood that deflects unwanted light and protects the lens from damage.