Extending the range of compatible lenses while maintaining their original field of view, the Canon Mount Adapter EF-EOS R 0.71x permits attaching EF-mount lenses to RF-mount cine and mirrorless cameras. Intended for cameras featuring a Super 35 sensor size, this adapter also incorporates an optical system to increase the effective angle of view by 0.71x, reducing the effects of a full-frame to Super 35 crop factor and increasing the maximum aperture performance by one stop. Electric contacts are also incorporated into the adapter's design and maintain full communication between the camera and lens, as well as support metadata transmission and use of Dual Pixel AF with select Canon EF lenses. Also, the adapter has been specifically designed for the EOS C70 cinema camera and features four screws and a split locking collar to ensure a secure attachment.

Open Box Products Have a Limited 1-Year Manufacturer Warranty    Canon EF Lens to Canon RF-Mount Body    Designed for EOS C70 Cinema Camera    Adapt Full-Frame Lens to Super 35 Body    Increases Angle of View by 0.71x    Increases Maximum Aperture by 1 Stop    Electric Contacts Support DPAF and Data    Includes Secure-Attachment Mount

This adapter physically supports working with any Canon EF-mount lens; however, select lenses can maintain full Dual Pixel autofocus support and metadata transmission between the lens and camera, including:

• EF 16-35mm f/2.8L III USM
• EF 24-70mm f/2.8L II USM
• EF 24-105mm f/4L IS II USM

Related Questions and Answers

Q: 1. Does this adaptor work with Celestron Reflector telescopes if I have the the T-mount?

A: Technically it should fit but a direct RF t-mount adapter such as this Vivitar would be better: https://bhpho.to/3yrf0wI

Q: 2. Will this work with the C70?

A: Yes, it will work with the C70.

Q: 3. Will this adapter work on my 75-300 lense that I use to use on my Canon Rebel XTi camera?

A: Yes it is compatible with the Canon 75-300mm lens.

Q: 4. Will this adapter work with the original (Mark 1) version of the Canon EF 100-400mm zoom on the R7 body?

A: The Canon Mount Adapter EF-EOS R will work with the original Canon 100-400mm lens and the Canon R7.

Q: 5. Why does the adapter mount to the lens before connecting to the camera? I have a lot of relatively new ef-L lenses and would like to keep the adapter on the camera and change the lens vs taking the adapter on and off with every lens change.

A: It seems like you are removing the adapter from the camera body every time. You can leave the adapter on the body and dismount the lens only from it in order to swap lenses.

Q: 6. Is it made in Japan? Does it come with cover caps?

A: The Canon Mount Adapter EF-EOS R is manufactured in Taiwan. Canon does include a case, front, and rear caps.

Q: 7. I have a Tamron lense 18-270mm F/3.5 to 6.3 will this work with Canon R50 Mirrorless camera?

A: The Canon Mount Adapter EF-EOS R will fit the Tamron 18-270mm lens if it is the Canon mount version. It will work on the Canon R50 camera but in manual focus mode only.

Q: 8. I have a EF mount. Can this be used on that to use my efs lenses?

A: This adapter allows you to use a EF lens on a RF mount. There are no adapters for using a EF-S lens on a Full frame EF. You can use EF-S lenses on a APS-C EF mount without an adapter.

Q: 9. Will this adapter work on the new Red Raptor ST? I'd like to adapt my canon CN-E lenses to the V Raptor ST. Thanks.

A: Yes, it will work with any Canon RF mount cameras to connect all your Canon CN-E lenses with EF mount.

Q: 10. will the Canon lens extender EF 2x II work with the EF-EOSR5? any impact on video focus. using a ef70-200mm

A: Yes if you have the EF-RF adapter and on that you mount a Canon 2X teleconverter and the Canon 70mm-200mm f/2.8 the focusing is still fast and almost flawless.