Schneider Optics 138mm 85 True Pol Linear Polarizer Drop-In Filter
- 85/ True Pol Linear Polarizer. 138mm Drop-In Filter
- Reduce glare and unwanted reflections
- Saturate colors
- Deepen blue skies
- Improve contrast and penetrate haze
- Linear Polarizer
Schneider Optics 85/ True Pol Linear Polarizer. 138mm Drop-In Filter is by far the most effective polarizer for motion picture and television cameras. Having an extinction ratio of ER 374, it is 12-times more effective than other polarizing filters, and is unmatched in its ability to reduce glare and unwanted reflections, saturate colors, deepen blue skies, improve contrast, and penetrate haze. True-Pol Polarizing filters enable you to achieve a level of optical performance previously unavailable to cinematographers.
85 filters are used to correct the color of tungsten balanced film when shooting in daylight. Most films are shot using tungsten film which is exposed indoors without the need for a filter. When the production moves outside into daylight, tungsten balanced film is also used, with the addition of an 85 filter in front of the lens.
It should be noted that an 85 filter produces slightly cooler results than an 85B (with tungsten film in daylight) whereas an 85B converts tungsten film to daylight. The 85C produces the coolest results - more than either the 85 or 85B. However, it is interesting to remember that an 85C is also useful as a creative warming filter with daylight film in daylight.
Light rays which are reflected become polarized. Polarizing filters are used to select which light rays enter your camera lens. They can remove unwanted reflections from non-metallic surfaces such as water or glass and also saturate colors providing better contrast. The effect can be seen through the viewfinder and changed by rotating the filter. The filter factor varies according to how the filter is rotated and its orientation to the sun.
Note: Whereas the 85 series is used for tungsten film under daylight conditions, use the 80 series of filters when using daylight film under tungsten lighting. Linear polarizers are used with most video and manual focus photo cameras. They are not recommended for auto-focus SLR cameras.