Specifications:Made of aluminum with high quality.Completely manual control, manual focus and manual exposure.Made without glass, not focus to infinity.No electrical connection.There is no ROM connection on the ring so diaphragm control of the lens is set manually.Suitable for cameras and camcorders including for Canon EOS EF mount cameras, such as for Canon EOS 600D/60D/1100D, etc.Item Name: Mount Adapter for FD-EOSMaterial: Aluminum AlloyShape: RoundCompatible Model: for Canon EOSLens Module: for Canon FD TargetFeatures: Replacement, Easy Installation, Durable, Camera AdapterOuter Diameter: 6.5cm/2.56" (Approx.)Inner Diameter: 5cm/1.97" (Approx.)Notes:Due to the light and screen setting difference, the item&39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Mount Adapter for FD-EOS