Panasonic 7-14mm F4 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 14 - 28mm. With a max aperture of f4 at 7mm, we can not consider this lens fast on wide end but f4 at 14mm is not too bad for tele end.
This lens features on optical image stabilization which helps capturing sharper images at lower shutter speeds. Panasonic 7-14mm F4 ASPH is not a weather sealed lens, so you have to be extra careful against rain and dust.