Cinegel filters are meticulously manufactured on a heat-resistant base polymer utilizing a patented deep-dyed technology for heat stability and superior color transmission. On-line computerized colorimetry continuously monitors color and density against strict standards, thus assuring a reliable and consistent product. STRAW RoscoStraw Daylight Conversion filters are a series of yellowish amber filters that lower color temperature as needed. Offered as a yellower version of the traditional CTO series and is calibrated to the same color correction and transmission properties.