Highest quality protector filter. Protects your valuable camera lens without sacrificing optical performance. 【PRO1D Protector】 As a "digital design," this lens protection filter features the newly developed "Digital Multi-Coating (DMC)," black ink treatment around the glass, and more. It's a perfect lens protection filter for those seeking high quality at an affordable price. It can also be used for film cameras. 【Features】 Ultra-lightweight and ideal for wide-angle lenses with a thin frame. While the glass is the same 2mm thickness as a standard filter, the frame has been thinned through advanced machining techniques. Despite the thin frame, a screw is provided on the front of the filter, allowing for the attachment of a lens cap. The filter frame features knurling for ease of handling during attachment and removal. Black ink treatment is applied to the outer edge of the filter glass to reduce internal reflections.