This is a focal reducer lens-equipped mount adapter for attaching M42 mount lenses to Fujifilm X mount camera bodies. I purchased it new in July, but I'm selling it because I've only used it indoors 2-3 times. There are some minor scratches from attaching and detaching lenses, but the lens is in beautiful condition as it has been stored in a dehumidified storage box. This is a private sale, so I ask for your understanding. Please feel free to contact me if you have any questions. Included accessories: Front and rear caps, outer box, instruction manual [Excerpt from the official website] Compatible lenses: M42 mount lenses Compatible cameras: Fujifilm X mount cameras Compatible image sensor size: APS-C Length: 30mm Diameter: Φ64mm Weight: Approximately 160g