"A reducing ring to adapt larger filter diameters to smaller diameters of the lens thread. Specifically designed for use with the PolarPro Quartzline series high quality filters.
Do you have a lens with a filter thread that is smaller than the thread of the PolarPro Quartzline filters? With an adapter ring for the Quartzline filters, the size difference can be easily and cost-effectively "bridge". With the adapter ring 67-82 mm, you can use a quartz line filter with 82 mm thread on a lens with filter thread 67 mm. However, you only need an adapter if the filter in question is larger than the front thread of the lens. Or use a filter that has the same thread size as the lens. The adapter rings are made of solid brass with matte black finish that avoids unwanted reflections. Each PolarPro Quartzline series adapter ring comes in a protective case. ".