Panasonic 14mm F2.5 II ASPH 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 28mm. With a max aperture of f2.5, this is a fast lens.
Panasonic 14mm F2.5 II ASPH is not a weather sealed lens, so you have to be extra careful against rain and dust. Panasonic replaced the older Panasonic Lumix G 14mm F2.5 ASPH with this model. Follow the link to read our detailed comparison of these model: Compare Panasonic Lumix G 14mm F2.5 II ASPH vs Panasonic Lumix G 14mm F2.5 ASPH