The Canon Drop-in Circular Polarising Filter (CPL) for the EOS R Mount Adaptor lets you use a single CPL filter across your entire range of EF and EF-S lenses when shooting on an EOS R system camera. Rather than purchasing individual polarising filters for each lens, this drop-in solution slots neatly into a compatible Canon EOS R drop-in filter mount adaptor, reducing reflections, deepening blue skies, and enhancing colour saturation with ease. It is an ideal accessory for landscape, architecture, and outdoor photographers who regularly switch between lenses and want a convenient, cost-effective way to maintain consistent polarised results without the hassle of carrying multiple filters.