The Bower MC 2X C/Afi Tele-Converter is a lens adapter designed for Canon EOS mount lenses with a 35mm front. This product comes with a manufacturer warranty of 2 years, ensuring high quality and reliable performance. The tele-converter allows for extending the focal length of the lens, providing versatility and flexibility in capturing different types of shots. Overall, this adapter is a valuable accessory for photographers looking to expand their lens capabilities.