NiSi 150mm filter holders are made from aviation-grade aluminum with single element processed by CNC machine with Matte black frosted finish on the surface. The screw accessory are all made of copper and with black nickel plating. It’s durable and will reduce the influence of stray light on the imaging. The NiSi 150mm Filter Holder for Canon EF 14mm F/2.8L II USM is specially designed to be used with the Canon EF 14mm F/2.8L II USM lens but may also work with other wide angle lenses.
Square and rectangular filter systems solve problems that round, screw-on filters often cannot resolve. To begin with, one square or rectangular filter can be used with many different size lenses. As long as you have the appropriate size adapter rings, in most cases, one filter will serve the purpose.