MobiLinyi® 49-52-55-58-62-67-72-77 mm 7-piece metal Step up rings Lens Adapter for Canon Nikon Sony Pentax and many other lenses (Electronics)
In literally these rings are a fine thing: Precision mechanics, the works. I had no problems, the rings to screw iineinander nor, again to screw apart. For my sensibility they go fine consistently enough. After so much subtleties still a fine Rating: