The Tiffen 4 x 4" 80C Colour Conversion Filter increases the colour temperature from 3800 to 5500K, allowing the use of daylight-balanced film in tungsten lighting conditions. The cooling effect of this filter requires an exposure increase of one stop for normal results.

This filter is manufactured using ColorCore technology, a process that involves laminating the filter substrate between 2 pieces of optical glass and grinding it to a tolerance of 1/10,000th of an inch. It measures 4 x 4" / 101.6 x 101.6 mm.


Features:

- The colour conversion filter increases the colour temperature and provides a cooling effect.
- Converts from 3800 to 5500K for using daylight-balanced film in tungsten lighting conditions.
- Filter factor of 2 requires an exposure increase of one stop.


Specifications:

- Type: Blue Colour Conversion
- Dimensions: 4 x 4" / 101.6 x 101.6 mm (0.2" / 4 mm thick)
- Grade: 80C
- Filter Factor: 2 (1 stop)
- Effect: Increases colour temperature
- Application: For use when shooting with daylight-balanced film under tungsten lighting
- Colour Temperature: 3800 to 5500K
- Construction: ColorCore Glass