WonderPana FreeArc Essential ND 0.6SE Kit - Core Filter Holder, Lens Cap, 66 Brackets, 0.6 Soft Edge Grad ND and 145mm ND16 Filters for Canon 17mm TS-E Super Wide Tilt/Shift f/4L Lens FreeArc rotates filter at any angle: mount 1 round & 1 square filter, or 2 square filters simultaneously; Includes ND16 and 0.6SE Grad ND All metal build  Mounts like a lens hood; Ultra wide angle construction to eliminate vignetting Ability to mount a variety of 145mm & 6.6" wide graduated filters: UV, CPL, MC-CPL, ND4/8/16/32; 0.6 & 0.9 Hard & Soft Edge, Reverse & Color Grads Doubles as a hood to help protect your lens from damage, scratches, fingerprints and the elements 24 Month Manufacturer Warranty