Panasonic Leica 15mm F1.7 is an Auto Focus (AF) Wideangle Prime lens with FourThirds max sensor coverage. When mounted on a FourThirds sensor camera, it will give you an FF equivalent focal range of 30mm. Providing a max aperture of f1.7 at 15mm, this lens is very fast.
Panasonic Leica 15mm F1.7 is not a weather sealed lens, so you have to be extra careful against rain and dust.