The Laowa Filter Holder has been specifically designed to mount on to the Laowa 12mm f/2.8 Zero-D lens. Provides the lens with the ability to add an array of filter options. Attached to lens by aluminium screw knob. Insert up to two 100mm square filters or a 95mm CPL filter. Weighs just 200g. PLEASE NOTE: Can use only foamless square ND filters, slight vignetting a specific angles.