The Tiffen 4 x 5.65" 80B colour conversion filter allows you to increase the colour temperature from 3400 to 5500K, enabling the use of daylight-balanced film under tungsten lighting conditions. The cooling effect of this filter requires an exposure increase of 1.6 stops 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 polishing it flat to a tolerance of 1/10,000th of an inch. It measures 4 x 5.65" / 101.6 x 143.5 mm.


Features:

- The colour conversion filter increases colour temperature and provides a cooling effect.
- Converts from 3400 to 5500K to use daylight-balanced film under tungsten lighting conditions.
- The filter factor of 3 requires an exposure increase of 1.6 stops.


Technical specifications:

- Type: Blue colour conversion
- Size: 4 x 5.65" / 101.6 x 143.5 mm (0.2" / 4 mm thick)
- Grade: 80B
- Filter factor: 3 (1.6 stops)
- Effect: Increases colour temperature
- Application: For use when shooting with daylight-balanced film under tungsten lighting
- Colour temperature: 3400 to 5500K
- Construction: ColorCore glass