Thank you for viewing (⁎ᴗ͈ˬᴗ͈⁎) [Product Name] Map Camera WOR Protect Filter 67mm [Usage Period] Approximately 3 months [Price at Purchase] 3,980 yen I purchased and used this filter along with a lens during the same period, but I'm selling it now that I've switched to a magnetic filter set. After each use, I cleaned it with a lens pen and stored it in a dehumidified cabinet. The following is quoted from the Map Camera website: "WOR" = "Water & Oil Repellency" Map Camera's original water and oil repellent protect filter is now available! Considering interference with lens design, the aperture marking uses colorless ink on the filter frame. The glass uses "DHG Super Series" made by Marumi Optical Co., Ltd., which has high water and oil repellency. This is a Map Camera original protect filter that combines a simple design and high performance! Manufacturer: Marumi Optical Co., Ltd. / Country of Origin: Japan I have other items for sale, so I will offer a discount if you purchase them together.