This is a Kenko cross filter I bought a long time ago. It allows you to take enchanting photos of illuminations and other light sources. I don't think there are any scratches on the lens, but since it's old, I'm listing it as "used with dirt and scratches." It's 52mm. It may have mold, possibly due to poor storage. Please understand this before purchasing. I will wrap it in bubble wrap, and it will be shipped via regular mail (no tracking).