The Athabasca Square Filter-Holder & Adapter Ring are made from aviation-grade aluminium for increased strength & decreased weight. The surface is processed using a precise, environmentally-friendly oxidation resulting in a high-quality matte finish. A precise, high-quality CNC lathe is used to create the one-piece structure of the filter-holder & adapter ring. These lightweight, strong, easy installation adapter rings are available for any camera lens with different size.

**Adapter Ring is not included.**

Size: 114*121*20mm