This is one of the first lenses I own. Next to my kit lenses my first prime lens. It is perfect for its purposes. Macro photography on a prime level and next to macro photography a good use for portrait photography.
This lens was released by Panasonic in September 2009. It comes with MEGA O.I.S. and is upgradeable to Dual O.I.S. with a firmware update. Due to a magnification of 1:1 (2:1 35mm equivalent) it is a true macro lens. This lens comes with 14 elements in 10 groups. One ED element to minimize chromatic aberration and an Aspherical element. The diaphragm mechanism uses seven rounded blades.