Tiffen 77mm 85B Color Conversion Filter

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The Tiffen 77mm 85B Color Conversion Filter helps to decrease the color temperature from 5500 to 3200K, allowing the use of tungsten-balanced film in daylight conditions. The warmi ng effect of this filter requires a 0.6-stop increase in exposure for normal results. This filter is made using ColorCore technology, a process that involves laminating the filter substrate between 2 pieces of optical glass, grinding flat to a tolerance of 1/10,000th of an inch, and then mounting to precision metal rings. Color conversion filter decreases color temperature and provides a warming effect. Converts 5500 to 3200K for using tungsten-balanced film in daylight conditions. Filter factor of 1.6 requires a 0.6-stop increase in exposure. Show more