This is a BLACK MIST No.05 filter with a soft focus effect. The filter diameter is 77mm. I am selling this because I haven't used it very often. Although I haven't used it much, there are some minor scratches on the edge from use (see photos), but there are no problems with its use. Please understand that this is a used item before purchasing. The following is a quote from the official website: "Black Mist" is a soft filter that sandwiches very fine black diffusion material between optical glass. It suppresses the contrast between highlights and shadows, creating a soft depiction, and has a unique light diffusion effect. The appeal of Black Mist is that you can get a cinematic atmosphere on the spot without retouching. "Black Mist No.05 N" has 1/2 the soft effect of "Black Mist No.1 N". 05 (zero-go) means 0.5.