Specification: Condition: Brand New Material: Plastic, Alloy Color: Black Compatible Camera: for Canon FD Camera (A-1, AE-1 Program, F-1, FTb and others) Compatible Lens: M42 lenses (for Zeiss, Pentax, Praktica, Mamiya, Zenit) Weight: Approx. 30g Package List: 1 * Lens Adapter Focusing infinity: No ROM connection on the adapter Manual control: Diaphragm control of the lens is set manually Automatic control: Automatic diaphragm, auto-focusing, or any other functions will not operate correctly while using this adapter 'Stop-down mode': It will need to be used when metering since the lens does not have the ability to have its aperture controlled by the camera body Sturdy and durable: Made of stable alloy, long-term use is not a problem Focusing infinity: No ROM connection on the adapter Manual control: Diaphragm control of the lens is set manually Automatic control: Automatic diaphragm, auto-focusing, or any other functions will not operate correctly while using this adapter 'Stop-down mode': It will need to be used when metering since the lens does not have the ability to have its aperture controlled by the camera body Sturdy and durable: Made of stable alloy, long-term use is not a problem