The NiSi 82mm Adapter Ring for 100mm V6 Filter Holder enables the filter holder, which is included with a NiSi V6 100mm Filter Holder Kit, to be used on a lens with 82mm front filter threads. This adapter rings corrosion-resistant aluminium alloy construction renders it durable and lightweight. In addition, it features a gear to rotate optional circular polariser. A separately available NiSi V6 Protection Lens Cap can be placed over the front of this NiSi 82 Adapter Ring to protect an installed polariser filter as well as the lens it is mounted on. Please note that this adapter ring is a spare or replacement for the one included with the NiSi V6 Holder Kit.