In contrast, there are many that have been or are still being made for the EF mount... both by Canon themselves and a number of third party manufacturers. -Tubes/ci/276/N/4077634539?filters=fct_camera-body-... If you wanted you also could probably find a lot of them available used (not much to wear out, so I would consider used tubes so long as they are a quality brand like Canon or Kenko).