The H&Y 100mm Magnetic Filter Holder Set for 15mm f/4.5 Zero-D Shift Lens from Venus Optics is a custom-designed magnetic filter holder system that allows for the convenient use of 100mm wide, 2mm thick filters with the Laowa 15mm f/4.5 Zero-D Shift lens. This Magnetic Filter Holder system holds up to three pieces of 100mm wide filters, and it can rotate 360 degrees to shoot with the filter at different angles.