The marumi super dhg protect filter is a neutral filter that protects your camera lens without causing any unwanted filter effects. A standard protect filter can cause a lot of reflection and distortion to the sensor of your camera. The marumi super dhg protect filter is equipped with a special coating to overcome this by reducing the reflecting of the incoming light. The filter is made of high quality, clear glass and is water and dirt repellent. The transparent filter does not effect the exposure time and can therefore, be left on the camera lens. Due to the thin design, the super dhg protect filter is suitable for wide-angle lenses without causing vignetting to the image.