Features: Made of high quality metal, solid, durable, wear resistant, and long life time. Smooth surface, easy to assemble, very delicate workmanship. Full manual operation, manual focus, manual aperture adjustment, with the fuselage to achieve manual exposure, aperture priority exposure, infinitely far focus. Without any additional corrective lenses, the m4/3 adapter ring can be infinitely refocused, so as to retain the original image effect of the original lens. It only takes the imaging range of the middle half of the full lens, which is the most ideal part of the imaging, to give full play to the performance of the lens. Adapter ring for Olympus OM Lens to M4/3 camera body. Specification: Condition: 100% brand new Material: metal Color: black Suitable for lens: for Olympus OM Suitable for camera: for M4/3 camera body Size: approx. 6*6*3cm/2.4*2.4*1.2inch Weight: approx. 74g Package List: 1 * Adapter Ring 1、Made of high quality metal, solid, durable, wear resistant, and long life time. 2、Smooth surface, easy to assemble, very delicate workmanship. 3、Full manual operation, manual focus, manual aperture adjustment, with the fuselage to achieve manual exposure, aperture priority exposure, infinitely far focus. 4、Without any additional corrective lenses, the m4/3 adapter ring can be infinitely refocused, so as to retain the original image effect of the original lens. 5、It only takes the imaging range of the middle half of the full lens, which is the most ideal part of the imaging, to give full play to the performance of the lens.