They protect the camera s lens and affect the way light appears. There are two basic styles - the round threaded type and the square kind that slides into an adapter.
Filters come in almost any color but the most common are yellow, orange, green, blue and red.
This is one filter that videographers cannot do without. Its main purpose is to protect the lens from scratches, dirt and breakage. This filter reduces light reflected off shiny surfaces. It helps the camcorder see past the reflections from glass or water. This filter reduces the intensity of bright light.