Rokinon 85mm F1.8 is a Manual Focus (MF) Telephoto Prime lens with APS-C / DX max sensor coverage. When mounted on a APS-C / DX sensor camera, it will give you an FF equivalent focal range of 127.5mm. Providing a max aperture of f1.8 at 85mm, this lens is very fast.
Rokinon 85mm F1.8 is not a weather sealed lens, so you have to be extra careful against rain and dust.