The Schneider-Kreuznach RHOdium Full Spectrum Neutral Density (FSND) filters are a high-end ND filter line made specifically for the critical color standards of 4K, 6K, and 8K resolution cameras.

Schneider-Kreuznach RHOdium FSND filters answers the cinematographer’s call for a truly neutral ND that attenuates light evenly from the near ultra-violet (important for film) through the full visible spectrum and into the near infra-red. Our filters are manufactured to finer flatness/parallelism specifications than ever before. These new filters help resolve even the finest detail. Schneider-Kreuznach has engineered an extremely thin neutral density interlayer laminated between two sheets of crystal-clear water-white glass. Additionally the coating is kept safe from abrasions by being encapsulated within the glass, rather than on the surface. RHOdiums are the first filters to undergo a lab-tested tristimulus scan, a more critical color measurement than methods previously used to measure filter quality. This method verifies neutrality by utilizing a colorimetric algorithm that compares samples to perfectly neutral light. The result is unprecedented accuracy.