The Tiffen 138mm 85C Color Conversion / Ultra Linear Polarizer Filter will produce natural colors when shooting with tungsten film outdoors.
What do you do when you must take some photos outdoors and all you have left is tungsten film? Using tungsten film in daylight will produce a bluish cast in the photograph. The 85 series of filters will "bring back", i.e. color balance the tones in your images. These yellow filters are used to correct differences in color temperature between the recording medium (film/video) and the light source.
An 85C produces the coolest results of the 85 series - 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
Ultra Polarizer
Tiffen Ultra Circular Polarizing filters are good when a traditional polarizer doesn't give you enough "zip". The Tiffen "Ultra" polarizer gives you a little more. Ultra Polarizers bump up your blue skies a touch more just enough to make that critical difference. Ultra polarizers produce the best polarization effects available for professional motion picture and television work. They extract the maximum of unwanted glare from the scene and render crisp white clouds against a dramatically dark blue sky like never before.
Tiffen, a leader in the filter industry, proudly makes its filters in the USA and backs up its products with a solid 10-year warranty.