Olympus 1.5x teleconverter. It is in beautiful condition, including the exterior. Please refer to the photos for details and make your judgment. The only included item is the case. ☆ Outer dimensions: φ75, Mount: 55mm ☆ The 5th photo was taken with a Sony camera, a close-up image. ☆ The camera in the 6th photo is for reference only and is not included.