Black Mist Filter Optical Glass Aluminum Double Sided Multilayer Nano Coating Beauty Soft Filters for POCKET 31HD IMAGING: The use of optical glass, which is ground and polished, is able to produce high definition image effects, maintaining clarity and detail. 2TRUE COLOR REDUCTION: Adopting double sided multi layer nano coating process, it can restore the true color, the color is more full and delicate. 3WATERPROOF AND OILPROOF: This filter has a double sided oil and water repellent function, which protects your lens from water droplets and grease. 4MODIFYING EFFECT: It can soften the highlights, reduce the sharpness of the image, and has a certain effect of lightening the skin folds and blemishes. 5EASY TO USE: It won't damage the original lens when installing, and you can change the filter at any time, which won't let you miss any wonderful moments.