Rosco 85: orange color correction filter converting daylight (5600K) to tungsten (3200K), reducing light by approximately 2/3 stop.
Definition
Rosco 85 is an orange correction filter that converts daylight (5600K) to artificial light color temperature (3200K). The filter reduces light output by 2/3 stops.
Practical Application
The filter is used for:
- Color Correction: Matching daylight sources to Tungsten artificial light
- Light Control: Reducing light intensity while simultaneously converting color
- Effect Design: Creating warm lighting moods with daylight sources
- Efficiency Increase: Avoiding complex color corrections in post-production
Technical Details
Technical specifications:
- Available as a roll of gel or cut sheets
- Various densities: 85, 85B, 85C for different conversion degrees
- Light transmission: approx. 36% (loss of 2/3 stops)
- Mounted in front of lights, windows, or directly on the lens
Practical Tips
- Perform exposure metering after filter attachment
- Test combinations with ND filters for further light reduction
- Use heat-resistant variants when heat development is a concern
- Protect from direct sunlight and moisture
Professional Standards
Standard use in film and TV productions for:
- Color consistency between natural and artificial light sources
- Quick adjustments without changing fixtures
- Cost reduction through fewer required Tungsten lights
- Uniform color temperature in mixed lighting setups
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