Compatible with EF/EF-S Lenses
Whether you’re purchasing your first EOS camera or your fifth, the EOS R camera is designed to integrate smoothly into existing EOS systems. Engineered to work seamlessly with RF lenses, it maintains complete compatibility with EF and EF-S lenses by using one of three optional Mount Adapters. When using EF-S lenses, the EOS R even crops automatically to reflect the APS-C sized sensor the lenses are designed for.
54mm Large Diameter and Short Back Focus
The RF mount on the EOS R camera has a large, 54mm internal diameter that enables impressive handling and provides increased flexibility for lens design. And thanks to the camera’s mirrorless design, the lens’s rear element can be much closer to the image plane. This reduced back focus distance, combined with the RF mount’s 54mm diameter, helps facilitate lenses of stellar optical quality and stunning performance while enabling innovative compact camera and lens designs.
20mm Flange Focal Distance with Robustness for Professional Use
All RF lenses feature a 20mm flange focal distance, which is the distance from the lens mount to the surface of the image sensor. This flange focal distance balances the benefits of short back focus with the engineering requirements necessary for mount stability. Accordingly, the RF mount’s flange focal distance ensures excellent optical performance while maintaining the mount rigidity and camera durability necessary for real-world operation.
12 Pins for Quickly Communicating Large Amounts of Information
With a robust 12 pin connection between the camera and the lens, the EOS R camera and RF lenses are able to communicate at a higher speed, transmitting a larger amount of data and information for incredibly fast AF, plus enhanced image stabilization and optimization.
Variety of Mount Adapter Options for Expanded Compatibility with EF/EF-S Lenses
Mount adapters, such as the Mount Adapter EF-EOS R, deliver seamless connections between the EOS R camera and EF and EF-S lenses with all functions intact. Offering L series level weather and dust sealing, the Mount Adapter EF-EOS R is even compatible with EF extenders like the Extender EF 1.4x III to extend your camera’s optical reach. With an entire arsenal of EF and EF-S lenses at your disposal, the Mount Adapter EF-EOS R and other mount adapters ensure endless creative possibilities for the EOS R camera.
Beyond enabling use of EF and EF-S lenses on the EOS R camera, the Control Ring Mount Adapter EF-EOS R and the Drop-in Filter Mount Adapter EF-EOS R add functions that open up a number of new possibilities for creative image capture. The Control Ring Mount Adapter EF-EOS R adds a control ring like those found on RF lenses, providing the same level of control to your EF and EF-S lenses and supporting the same setting configuration regardless of lens. The Drop-in Filter Mount Adapter EF-EOS R enables compatibility with EF and EF-S lenses and includes drop-in filter capability for use with circular polarizing filters or variable ND filters. This enhancement enables compatibility with numerous lenses regardless of their front diameter, and makes filter use possible with lenses like the ultra-wide EF 11–24mm f/4L USM lens or the tilt-shift TS-E 17mm f/4L lens which cannot accept a filter on the front.