CANON EF-EOS R 0.71X MOUNT ADAPTERCanon 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 ###split### 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