This is a close-up attachment for a Pentacon camera. I believe it's for a Pentacon Six, but I'm a camera novice and not sure. It may fit other cameras as well. Experts, please advise. Please make your judgment based on the photos. This is an accessory that attaches between the camera and the lens. I believe it's rare. There is no major damage and it's in relatively good condition, but it is a used item, so there may be minor scratches, scuffs, discoloration, paint loss, and dirt, and some may be overlooked. Those who understand this and have knowledge, please consider. Feel free to comment for additional photos, questions, or price negotiations. I look forward to hearing from you.