Features: With this adapter, you can use for Olympus OM lens on for Canon EOS R camera. There are no electronic components in the adapter, the aperture and focus must be manually controlled. Ensures infinity focus. Suitable for OM bayonet lens. Fit for Canon EOS R full frame mirrorless camera body. Specification: Material: Aluminum & Brass Fit for Canon EOS R camera (not suitable for Canon EOS EF mount film, digital SLR camera or EOS M EF-M mount camera) Size: 6*5*3cm / 2.36*1.97*1.18in Package weight: Approx. 84g / 2.9oz Package list: 1 * Adapter Note: After installing the adapter on the camera, the item "release shutter without lens" in the menu need to be opened before the shutter can be pressed. 1With this adapter, you can use for Olympus OM lens on for Canon EOS R camera. 2There are no electronic components in the adapter, the aperture and focus must be manually controlled. 3Ensures infinity focus. 4Suitable for OM bayonet lens. 5Fit for Canon EOS R full frame mirrorless camera body.