Just right for Sony RX100III

I have to be able to buy an existing polarizing filters to use this adapter and using close-up lenses on the camera.
Both work well. With the close-up lens Macro shooting is possible. Of course, not with the quality of a special lens, but for normal considerations, it is enough perfectly. But at least the 52mm variant shall be selected for the RX100III; otherwise black edges are possible.
The installation also succeeds easily with preparation (cleaning of splices) and a steady hand. A template for centering the ring would be helpful. The magnet is to keep enough around 1-2 lenses safely on the lens; stronger magnetic forces could damage the tube when releasing the adapter otherwise probably.
I am completely satisfied.