NiSi's Close-up Lens NC is made of dual optical corrective lens parts with an apochromatic design and a NiSi Multi Nano coating to provide advanced resolution and natural color with almost no purple/green fringing, both within the in-focus area and in the bokeh in the background. This result is, of course, highly dependent on the image quality of the lens used. A telephoto zoom or telephoto lens with APO or ED glass is therefore highly recommended.
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The NiSi Close-up Lens NC comes with two adapter rings of 77-72 and 77-67mm screw thread and comes in a nice case.

There is one for smaller diameter lenses 58mm version available. This comes with a pouch and two adapter rings of 58-52 and 58-49mm thread.