Features: This EF-EOS R lens adapter perfectly mounts Canon EF/EF-S series lenses onto Canon EOS R series cameras. When using EF lenses, the focal length remains unchanged. When using EF-S lenses, the image is automatically cropped, changing the focal length to 1.6 times the original. Compatible with Canon EOS R full-pixel dual-core focusing technology, offering a large focusing area, fast focusing speed, and high accuracy. The EF-EOS R adapter ring features built-in metal contacts and data chips, allowing you to quickly and efficiently adjust the aperture on the camera, greatly improving convenience. Adopting gold-plated electronic copper contacts enhances data transmission performance between the lens and the camera. View shutter, aperture, ISO, and other information parameters on the camera end. Supports EXIF information transmission and lens shake resistance. Made from aircraft-grade aluminum, strong and durable. The tripod socket is detachable with a 1/4-inch hole at the bottom for easy installation on a tripod or other fixed mount. Specifications: Material: Metal Compatible Lens: For Canon EF/EF-S series lenses Excluding RF/EF-M/CN-E (EF CINEMA LENS) Compatible Camera: EOS R series cameras Focus Mode: Autofocus Tripod Socket: 1/4 inch hole Diameter & Length: 68mm*24mm Item Weight (with cap): 127g / 4.5oz Package Size: 10.9 * 9.9 * 6.0cm / 4.3 * 3.9 * 2.4in Package Weight: 235g / 8.3oz Package List: 1 * Lens Mount Adapter with Cap 1 * User Manual Some cameras may not require a lens release when using the lens adapter. Before using the adapter, enable this function in the settings.