Full Spectrum IRND + POLA + Glimmerglass½ Tiffen has combined innovative IRND technology with our Linear Polarizing and Glimmerglass½ filters to create an exciting new four-in-one combination filter. These filters provide color and contrast enhancement; remove unwanted glare from hot spots while adding a subtle glow of Glimmerglass½ diffusion effect. The combination provides cinematographers with sensitive controlled filtration in exterior environments. Tiffen has responded to the demand of IR pollution control filters. Now we're expanding the range by combining the technical benefits of IRNDs with some of our best selling Special Effect Filters. Once again, Tiffen's ColorCore technology provides filmmakers with the necessary tools to create the world's greatest images.