Wonderpana 145 System Core Kit for Various 14mm Full Frames: ie; Samyang, Rokinon, Polaroid, Vivitar, Bower, Falcon, Pro-Optic, Bell & Howell, Opteka, Walimax Premium Grade Anodized Aluminum WonderPana 145 Core Unit Doubles as a hood to help protect your lens from damage, scratches, fingerprints and the elements Provides the ability to mount a variety of 145mm filters and more Ultra wide angle construction to eliminate vignetting 24 Month Manufacturer Warranty