Best reviews of Rosco Cinegel Quarter Blue (1/4 CTB), 48″x25′ Roll of Color Correction Lighting Filter
Boosts 3200°K sources to 3500°K. A partial conversion to compensate for varying daylight conditions and voltage reduction, or to boost aging HMI lamps or household incandescant sources. Deep-dyed base. (Mired shift = -30, Trans.= 74%, -0.4s).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).