Rosco Cinegel Half Blue (1/2 CTB), 20" x 24" Color Correction Lighting Filter
Boosts 3200K sources to 4100K. A partial comversion to compensate for varying daylight conditions and voltage reduction, or to boost aging HMI lamps and yellowed soft lights. Deep-dyed base. (Mired shift = -68, Trans.= 52%, -0.9s).Tungsten Conversion Filters are a range of blue filters that raise color temperature as needed. Although typically used on tungsten-halogen sources to balance with daylight, the range offers a multitude of technical and aesthetic color correction possibilities. The material is deep-dyed for heat stability and superior color transmission. Rolls 48" x 25' (122 cm x 7.6 m), sheets 20" x 24" (50 cm x 61 cm).