Canon has made an RF speed booster! However, there's catch…

Canon has made an RF speed booster! (With a couple of provisos…)
(Image credit: Canon)

Yes, Canon really has made its own speed booster for the RF mount! The new Mount Adapter EF-EOS R 0.71x adds a stop of light-gathering speed when you adapt your EF lenses… however, it comes with a very specific proviso. 

While it is designed for the RF mount, the Mount Adapter EF-EOS R 0.71x will only work with a Super35 sensor. So, while it will physically fit any Canon EOS R body, it will only function correctly with the new Canon EOS C70 cinema camera. 

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James Artaius

The editor of Digital Camera World, James has 21 years experience as a journalist and started working in the photographic industry in 2014 (as an assistant to Damian McGillicuddy, who succeeded David Bailey as Principal Photographer for Olympus). In this time he shot for clients like Aston Martin Racing, Elinchrom and L'Oréal, in addition to shooting campaigns and product testing for Olympus, and providing training for professionals. This has led him to being a go-to expert for camera and lens reviews, photo and lighting tutorials, as well as industry news, rumors and analysis for publications like Digital Camera MagazinePhotoPlus: The Canon MagazineN-Photo: The Nikon MagazineDigital Photographer and Professional Imagemaker, as well as hosting workshops and talks at The Photography Show. He also serves as a judge for the Red Bull Illume Photo Contest. An Olympus and Canon shooter, he has a wealth of knowledge on cameras of all makes – and a fondness for vintage lenses and instant cameras.