Extending the range of compatible lenses, the Canon Control Ring Mount Adapter EF-EOS Ris a unique lens adapter designed for attaching any EF or EF-S-mount lens to the EOS R mirrorless digital camera. This sophisticated adapter incorporates a customizable Control Ring, the same as that on native RF-mount lenses, for intuitively adjusting exposure settings, such as ISO, aperture, and exposure compensation. This ring provides tactile feedback when being turned, making it easy to recognize and control your settings adjustments. It also retains full autofocus and image stabilization capabilities and contains no optical components, thereby maintaining the original optical quality of the mounted lens. Additionally, it is dust- and water-resistant, making it suitable for use in harsh weather conditions.

Canon EF/EF-S Lens to EOS R Camera    Maintains AF and Image Stabilization    Configurable Control Ring    Dust- and Water-Resistant

Related Questions and Answers

Q: 1. Can I configure this control ring to change the aperture of an L lens?

A: Yes.

Q: 2. How much does Canon charge to de-click this ring? The Canon website says there is a fee for this.

A: will this work with canon cinema lenses?

Q: 3. Will this adapter work to mount my canon EFS 55-250 lens to my canon EOS 5dsr ? I don't see it in the compatibility list

A: This adapter is only for use with Canon EF-S and EF DSLR lenses being attached to Canon's EOS R mirrorless camera mount. There isn't a way to attach an EF-S lens to an EF mount.

Q: 4. What is the difference between this ring and the adapter ring?

A: If comparing the Canon Control Ring Mount Adapter EF-EOS R B&H # CAMAEFRFCR to the Canon Mount Adapter EF-EOS R B&H # CAMAEFRF, the former model offers a control ring to allow the user to set various functions on the EOS R camera. Otherwise, both models allow for Canon EF and EF-S lenses to work on the EOS R with full autofocus.

Q: 5. How well does video autofocus work when using this adapter?

A: Autofocus is very good when using this adapter.

Q: 6. Does the control ring mount adapter come with dusk covers for the RF and EF sides? Or are they separately purchased?

A: Yes the adapter comes with the front and rear caps.

Q: 7. Will this adapter work in Video mode or just Photo mode?

A: This adapter works in both Photo and Video mode.

Q: 8. When using this adapter with an ef-s lens, will there still be a 1.6 crop factor on the EOS R?

A: the crop factor is due to the sensor size is smaller than a typical full frame 35mm film size. when a lens is mounted on EOS R, which is a full frame camera, the crop factor is 1. i.e., a 50mm EF-S lens just have same image size as 50mm EF lens. however, since EF-S lenses are designed for smaller sensor, when mounted on full frame body the corners likely would have significant vignetting.

Q: 9. When this adapter is used to control aperture, does the camera focus at the set aperture, or wide open?

A: the camera focuses at wide open aperture

Q: 10. Will this work on the RP

A: The Canon Control Ring Mount Adapter EF-EOS R, will work on the Canon RP camera.