The M.Zuiko Digital 17mm f/2.8 (Black) from Olympus is a wide-angle pancake lens for Olympus PEN and other cameras using the Micro Four Thirds format. It has a 17mm focal length (equivalent to 34mm on a 35mm format camera) and a fast f/2.8 maximum aperture for shooting everything from landscapes and portraits to close-ups with outstanding image quality. This lens is so compact (only 0.87" (22mm) long), that with the camera attached, you can carry it in a handbag, purse, and even a coat pocket. It (barely) tips the scales at a negligible 2.5 oz (71 g).