I was cleaning out my grandfather's house and found this, but I'm a camera novice so I don't know the details. Since the details are unknown, I'm selling it as junk. If anyone is interested, please let me know. The following is an AI-generated description: Mount adapter for attaching Hasselblad lenses to Nikon cameras. - Brand: Kenko - Model Name: Mount Adapter for Hasselblad Lenses - Compatible Cameras: For Nikon - Price: ¥3,200 - Function: Allows Hasselblad lenses to be attached to 35mm SLR camera bodies. Thank you for looking.