Lets study Panasonic Lumix G 20mm / F1.7 II ASPH objective lens with 20 mm fixed focus for Micro Four Thirds mounts. Its diaphragm is set in F1.7 – F/16 range with use of 7 blades; minimal focusing distance is 0.2 m; field of view is 57 degrees. There are 7 lens elements in 5 groups set in the objective, 2 of them are aspherical ( to reduce image geometrical and color distortions ); all lens are covered with protective and anti-reflective multicoating. There is ability to attach 46 mm optical filters to it; objective lens sizes are 63 x 25.5 mm, its weight is : 87 g; its body is made from metal, which increases its durability and reliability. It has no image stabilization functions and have automatic focusing with use of built-in motor. Package contains : Panasonic Lumix G 20mm / F1.7 II ASPH objective lens itself, front and back caps, lens storage bag and user’s manual. There is need to note, that this objective lens can be used not only with Panasonic cameras, but with all other cameras, that support Micro Four Thirds mounts, for example, Olympus.