Panasonic 14-140mm F4-5.8 OIS 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 - 280mm. With a max aperture of f4 at 14mm, we can not consider this lens fast on wide end, and it is slow at the tele end with its max aperture of f5.8.
This lens features on optical image stabilization which helps capturing sharper images at lower shutter speeds. Panasonic 14-140mm F4-5.8 OIS is not a weather sealed lens, so you have to be extra careful against rain and dust.