Rosco Photo Lighting Filter Kit 12x12"A selection of filters, hand picked to be the essential lighting filters photographers need. The kit contains one piece each of 20 different colours that colour correct and add coloured effects to the light in your shot. CTO and other filters that warm up the lights in your shot. CTB filters for creating cool lit lighting effects. Neutral Density filters for lowering the overall output of non dimmable light sources. Plusgreen for balancing your strobe