The Syrp Small Circular Polarising Filter is 67mm & comes with two step up adapter rings. The frame is constructed from aluminium whereas the filter itself is made from ultra-high quality glass which comes with an anti-scratch layer as well as multi-coating with extra low reflection rate. The user is able to capture deeper blues in the sky, enhance contrast in clouds, & eliminate washed out glare thanks to this filter. In addition to this the Syrp CP helps to enhance colour saturation, & contrast, decrease unwanted reflection when working with windows or water, as well as making the images & footage look much more vibrant. This makes it absolutely ideal for landscape & time-lapse photographers as well as filmmakers that regularly work with harsh outdoor lighting.