The Marumi Protect Filter Super DHG 37 mm is a neutral protection filter that safeguards the lens without unwanted filter effects. A standard protect filter often causes significant reflection and distortion on the camera's sensor. This Super DHG protect filter features a special coating that reduces the reflection of incoming light. The filter is made from the clearest type of glass and is water and dirt repellent. The protection filter does not extend the exposure time. Thanks to its thin frame, you won't have issues with vignetting when using wide-angle lenses.