This is the Lee 85B Filter Colour Correction (Resin) for 3.9 inches (100 mm) System [LEE85B100U2]
Warm up filters can be used for technical purposes, color temperature correction from daylight to tungsten light sources for example, or for effect in landscape photography. A warm up filter can work wonders for an image, boosting colors or just adding a pleasing warmth that may not be present naturally. The trick is not to overdo it, and a little warmth is often that is needed to make the difference. Generally available in both graduated and standard types. These filters have a variety of products. Although designed to convert the color characteristics of a light source to balance with the film type in use, they can also be used deliberately to create a warm or cool overall color cast. ... Contact us if you need more help.