77 / 82mm diameter is optional, only suitable for 77 / 82mm lens This is an excellent photography tool that can make your photos unique without using any effects It can be connected with an adapter to convert it to a lens with other diameters This is also a nice way of looking at the world, you can see new landscapes, night scenes As a surprise prism photography accessories, it can create cool refraction effects on photos Using this glass prism, you can take interesting effects Before shipment, our products will undergo a comprehensive inspection to that the products are not defective or damaged in the hands of each consumer premium k10 optical glass with high transparency premium optical glass and hardware, it has strong wear resistance and long service life