The NiSi Filter Holder 100 for the Laowa 12mm f/2.8 wide angle lens allows the use of 2x 100mm filters (2mm thick) and an included 86mm ultra slim circular polarizing filter (CPL).
It is made from aviation-grade aluminium with single element processing by CNC machine. A matte black frosted surface finish is used to minimize reflections. With a unique adjustment wheel the CPL filter can easily be rotated at any time, which means you no longer have to adjust it before inserting other filters.
Filter holder