This 21 x 21cm Set of 20 Colour Correcting Filters from Elinchrom is designed to modify the light output of your Elinchrom head. The set includes six CTO filters of varying power for converting daylight-balanced lights to tungsten, six CTB filters or varying power to convert tungsten light to daylight colour, four neutral density (ND) filters of varying power for reducing light output, and four diffusion filters of varying power for softening the light. Use them in combination with Elinchroms 21 cm reflector and Light Shaper Carrier (code 26034) to creatively alter your results.