Olympus ED 14-150mm f4-5.6 is an Auto Focus (AF) SuperZoom lens with FourThirds max sensor coverage. When mounted on a FourThirds sensor camera, it will give you an FF equivalent focal range of 28 - 300mm. With a max aperture of f4 at 14mm, we can not consider this lens fast on wide end and neither at tele end with its f5.6.
Olympus ED 14-150mm f4-5.6 is not a weather sealed lens, so you have to be extra careful against rain and dust. Olympus ED 14-150mm f4-5.6 was replaced with Olympus M.Zuiko Digital ED 14-150mm F4-5.6 II. Follow the link to read our comparison of these cameras:
Compare Olympus M.Zuiko Digital ED 14-150mm f4-5.6 vs Olympus M.Zuiko Digital ED 14-150mm F4-5.6 II