The 12mm f14 asph leica dg summilux lens from panasonic is a high quality high speed lens made up of 15 elements in 12 groups constructed from durable metal the lens has a sophisticated design to match the line up of lumix g cameras and is dust and splash proof due to the wide focal length and rugged build it is suitable for outdoor photographers and is ideal for capturing wide landscape shots the f14 aperture which is made up of nine aperture blades guarantees an attractively smooth