82mm Filter Mounting adapter for Aero Ektar 7 "178mm f2.5 This adapter allows to mount 82mm standard size circular filter on the Aero ektar 178mm f25 lens. The adapter is designed to snaps on the original lens ring. Thread for the filter mounting is in anodized aluminum. The rest of the adapter is 3d printed. The material is strong and durable. Shipping is with Priority mail. The lens is not included For any question please contact me.