Set of 6 ND (Neutral Density) filters (ND 0.5, 1, 2, 3, 4, 5) in C-mount threaded, stackable holders for use with most WinCamD and BladeCam beam profiling cameras. Includes caps with alignment targets.
Filters are mounted at 3° to axis. ND value specified at 675 nm. See charts for ND filter transmission curves.