Use this M-Series Optical Low-Pass Filter from Leica when using an M-Series lens on a RED DSMC2 camera. The filter is required when using the M-Series lenses for sensor IR protection and installs with the RED M-Mount adapter mount. The M-Mount filters are compatible with DSMC2 cameras such as MONSTRO, HELIUM, DRAGON-X, GEMINI, and SCARLET-W.