Lumicon 2 Inch Variable Polarizing FilterLumicon 2 Inch Variable Polarizing Filter is an all phase lunar filter for large telescopes. Transmittance is continuously variable from about 5% to 35%. Lumicon 2 Inch Variable Polarizing Filter Lumicon 2 Inch Variable Polarizing Filter is an all phase lunar filter for large telescopes. Transmittance is continuously variable from about 5% to 35%. Lumicon Polarizing Filters are made from high quality optical glass and allow for maximum contrast of