Fujifilm XF 8-16mm F2.8 R LM WR is an Auto Focus (AF) Wideangle Zoom 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 12 - 24mm. With a max aperture of f2.8, this lens is fast on wide end and equally fast at 16mm with a max aperture of f2.8.
Fujifilm XF 8-16mm F2.8 R LM WR is weather sealed which makes it an ideal lens for outdoor use, especially when coupled with a weather sealed camera body.