- Specifically compatible with Canon EF and EF-S lenses on Canon EOS R and RF mount full-frame cameras. - Enables fast and stable autofocus and IS image stabilization, helping you shoot clearer and higher-quality photos. Also supports fast EXIF information transmission and electronic aperture control. - Built from premium aluminum alloy with exquisite workmanship; robust, rustproof and impact resistant. - Features gold-plated contacts to greatly improve data transmission between the lens and camera. - Use scenarios: - Travel or street photography: use EF or EF-S lenses on EOS R RF mount bodies to expand your lens options while maintaining reliable AF and IS. - Event or portrait sessions: fast autofocus and image stabilization for sharp portraits in varying lighting, with smooth exposure control via electronic aperture. - Studio or outdoor shoots requiring stable data transfer: high build quality and gold-plated contacts ensure consistent EXIF data and lens-cam communication.