Description: You can use this camera adapter ring to be installed on a Canon EOS camera for Pentax K PK lens with a 6th generation chip that can be used for Canon digital SLR cameras. Accuracy: make full use of the EOS body's advanced electronic focusing technology, even in the case of weak light, small aperture can accurately focus. Flexibility: multi-point focus with EOS body, up to 45-point focus, giving you more flexibility in composition. Fast: eye-catching focus tips will give you more confidence in your photography. Made of metal, excellent workmanship, infinity focus. Specification: Material: Metal Diameter: 64 mm/2.52 inch Height: 6 mm/0.24 inch Package Includes: 1 Piece Mount Adapter Ring Note: Please allow a slightly errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understanding and attention