Made of black anodized aluminium the KIWIFOTOS LMA-OM_EM lens mount adapter allows Olympus OM lens to be used on any Sony E-Mount camera body such as NEX3/NEX5 Camera. Although the lens fits physically, aperture control and auto-focusing control are not retained. In this case "stop-down mode" need to be used when metering since the lens does not have the ability to have its aperture controlled by the camera body. Use the lens in the fully manual exposure mode (M) or AV mode in auto exposure, the aperture display is not available, however. Select MF assist function to focus accurately (7x or 14x zoom focus). Infinite focus is available. Note: Shoot without lens function must be turned on.