Canon efs 18-135mm is nano usm lens This item is listed as parts or not working as there is an intermittent fault with the lens not wanting to hit focus, or taking a short while to focus. Sometimes it works fine with no issues. Or if the camera is turned off then on again it sometimes sorts the issue and the Lens focuses. This used to be my preferred lens due to its great optics and ability to provide a nice field of zoom. Item comes from a smoke and pet free home The lens will be well packaged No returns due to type of listing