Fotodiox Pro 100mm Filter System 82mm Threaded Lens Adapter Ring - fits Fotodiox Pro 100mm Filter Holder and Cokin Z-Pro (L) Series Filter Holder Industiral Grade Anodized Aluminum Adapter Ring for the Fotodiox Pro 100mm Filter Holder and Cokin Z-Pro series of filter holders Designed for Full Frame, Medium Format or expert DSLR APS-C cameras; also well adapted for Broadcast cameras. 24 Month Manufacturer Warranty