NiSi 58mm True Color CPL PRO Nano Circular Polarizing FilterThe NiSi 58mm True Color CPL Pro Nano Circular Polarizing Filter is designed to reduce glare and reflections from non metallic surfaces, increase saturation and vibrancy in the sky and foliage while ensuring true color reproduction is at its best by eliminating the warming effect that many polarisers create. It removes the warm tone seen with other brands of CPL filters and provides a closer true color representation of the scene. Two Tone Frame It