Fujifilm GF 120mm F4 R LM OIS WR Macro is an Auto Focus (AF) Telephoto Prime lens with 645 max sensor coverage. When mounted on a 645 sensor camera, it will give you an FF equivalent focal range of 0mm. With a max aperture of f4 at 120mm, this is a moderately fast lens.
This lens features on optical image stabilization which helps capturing sharper images at lower shutter speeds. Fujifilm GF 120mm F4 R LM OIS WR Macro is weather sealed which makes it an ideal lens for outdoor use, especially when coupled with a weather sealed camera body.