Circular polarisation filters They eliminate undesirable reflections from shiny surfaces and help to enhance color contrasts. Filter P-cir, E52 Discover Filter P-cir, E55 Discover Filter P-cir, E60 Discover Filter P-cir, E67 Discover Filter P-cir, E72 Discover Filter P-cir, E82 Discover Filter P-cir, E95 Discover