EOS R from Canon is a new mirrorless camera system that uses a large-diameter RF mount with a short back focus and high-speed communication. With dramatically improved freedom in optical design, it realizes image quality that surpasses expectations. This camera fuses a next-generation operating system that enables the user to complete all operations without looking away from the viewfinder with ergonomics that were cultivated over the 30-year history of EOS. Equipped with a control ring and mount adaptor with drop-in filters, the EOS R System adds new value to traditional EF lenses.