Lens filters are translucent pieces of glass placed in front of a camera lens to alter or adjust the light entering the camera and more importantly to protect the camera lens. Lens filters improve photographs by giving you control over light and allowing you to emphasize the features of a scene that you consider most important. This filter kit is a combination of the three essential filters no photographer should be without. PLEASE NOTE: Some cameras require an adapter tube to fit the filters. This filter set is compatible with the following camera models: Nikon D40 D60. FILTER FD: The F-DL fluorescent light correction filter gives true-to-life color rendition by removing the harsh yellow-green cast ordinarily resulting from fluorescent bulbs. When shooting under natural light, a fluorescent filter dramatically increases color saturation of subjects. FILTER FD: The F-DL fluorescent light correction filter gives true-to-life color rendition by removing the harsh yellow-green cast ordinarily resulting from fluorescent bulbs. When shooting under natural light, a fluorescent filter dramatically increases color saturation of subjects. FILTER PL: Polarizers let you achieve vibrant color saturation, reduce or eliminate glare and reflections from non-metallic objects and glass surfaces, and minimize haze. The filter can be rotated to determine the amount of reflection to be removed.