MobiLinyi® 77-72-67-62-58-55-52-49 mm 7-Piece Metal Step Down 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: