Metabones' new EF-RF Speed Booster reduces Canon EOS R 4K crop factor
Metabones has released a new Speed Booster that reduces the significant 4K video crop factor found on the Canon EOS R full-frame camera systems. With this adapter, photographers can use Canon EF full-frame lenses with the Canon RF mount, significantly reducing the 4K crop on the EOS R from 1. dpreview.com »