This high-quality rubber ring is a essential part for your Canon EF 50mm f/1.2L USM lens. It provides manual focus and is compatible with Canon EOS cameras. The ring is made in Japan and is an original Canon product. It is perfect for those who need a replacement part or for those who want to customize their lens. The ring is made specifically for the Canon EF and L USM models and is a great addition to your camera accessories. Get your hands on this essential part and take your photography to the next level.