Very beautiful, bellied design, heavy-weight for a Zuiko: Length: 72 mm, weight: 520 gr., filter thread 55 mm. The Zuiko is a very well-made lens. The feel of the surface is excellent: The mount is metal with a thick rubber focus ring. Only manual focus. The aperture ring which is almost always attached in front of the lens by Olympus stop down softly. The depth of field button is attached at the lens down on the right. It is by far the best accessible position. The minimum focus is 70 cm. The smallest aperture is 22. The Bokeh is excellent (cf. http://www.pbase.com/ltolksdorf/image/120161130). The lens is very sharp wide open. Distortion and fall off arenīt a problem. Highly recommended, my best Zuiko lens.