Our 75mm Square Filter Holder System is lightweight, made from magnalium can hold up to two 75mm wide square filters at a time. You can also use our CPL filters with this adapter for adjustable polarization. The system comes with a main adapter ring and a square filter holder that connects to the adapter ring. The main adapter ring connects to 86mm diameter lenses – you can use this system with all other lens sizes with our range of different size adapter rings.