Panasonic LUMIX G 20mm Kit f/1.7 Aspherical Pancake Lens for Micro Four Thirds Interchangeable Cameras + Pouch & WSP Cleaning kit Panasonic's "Pancake" Lens, Compact and lightweight 20mm focal length; equivalent to 40mm on a 35mm film camera F1.7 brightness for beautiful, soft focus Comprised of seven lenses arranged in five groups; uses two aspherical lenses to effectively minimize distortion Used with Lumix G Micro System Cameras, allows for use of the advanced contrast Auto Focus (AF) system