Fujifilm GF 100-200mm F5.6 R LM OIS WR is an Auto Focus (AF) Telephoto Zoom lens with Medium Forma max sensor coverage. When mounted on a Medium Forma sensor camera, it will give you an FF equivalent focal range of 0 - 0mm. With the max apertures of only f5.6 at 100mm, and f5.6 at 200mm, the lens is quite slow at both ends.
This lens features on optical image stabilization which helps capturing sharper images at lower shutter speeds. Fujifilm GF 100-200mm F5.6 R LM OIS WR is weather sealed which makes it an ideal lens for outdoor use, especially when coupled with a weather sealed camera body.