Panasonic Lumix G 20mm F/1.7 ASPH is a compact and lightweight “pancake” lens announced September 2009 as the companion of the Lumix DMC-GF1 Micro Four Thirds camera (also can be used with Olympus PEN systems). The lens features 20mm ‘perfect normal’ fixed focal length; fast F1.7 maximum aperture, ‘Focus by wire’ manual focus system, with [...]