Panasonict 8-18mm F2.8-4.0 ASPH is an Auto Focus (AF) Wideangle Zoom lens with FourThirds max sensor coverage. When mounted on a FourThirds sensor camera, it will give you an FF equivalent focal range of 16 - 36mm. With a max aperture of f2.8, this lens is fast on wide end. The long end is also quite fast at f4.
Panasonict 8-18mm F2.8-4.0 ASPH is weather sealed which makes it an ideal lens for outdoor use, especially when coupled with a weather sealed camera body.