Rosco CalColor #4290 Blue Filter, 2.7 Stop, 24"x25' Roll
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The Rosco CalColor #4290 Blue Filter (2.7 Stop, 24"x25' Roll) is designed specifically to the spectral sensitivity of color film. This filter color is designed in 90 density, corresponding to the familiar 3 stop calibration. In color photography, three light-sensitive emulsion layers separately record the individual blue components of the spectrum.
CalColor filter adjusts the transmission of these color components at the individual light source in a familiar and reliable manner. As a result, the cinematographer can exercise selective and predictable control over the image's coloration as rendered by the film.
| Thickness | 2.0mil |
| Transmission | 15% - -2.7 stop |
| Application | Enhances blue transmission by effectively reducing green and red exposure. Heat resistant base, deep dyed |
| Material | PET (Polyethylene Terephthalate) |
| Roll Size | 24"x25' (61cmx7.62m) |