Features: Use Olympus OM lenses on Canon EOS R cameras with this adapter. The adapter contains no electronic components; aperture and focus must be manually controlled. Ensures infinity focus capability. Compatible with OM bayonet mount lenses. Designed for Canon EOS R full-frame mirrorless camera bodies. Specifications: Material: Aluminum & Brass Compatible with Canon EOS R cameras (not suitable for Canon EOS EF mount film cameras, digital SLR cameras, or EOS M EF-M mount cameras) Dimensions: 6 x 5 x 3 cm / 2.36 x 1.97 x 1.18 in Package weight: Approx. 84 g / 2.9 oz Package List: 1 x Adapter Note: After attaching the adapter to the camera, enable the "Release shutter without lens" option in the camera menu to operate the shutter.