Feature:1. Parameters can be set, after normal focus, there will be a focus prompt, supports exposure in aperture priority for AV mode and manual mode.2. Highquality alloy precise manufacturing, providing excellent operability and durability.3. Compatible for Contax CY lens and for Canon EF or EFS mount camera, let old cameras and lenses be used.4. Fit for Canon100D or 1100D or 1000D or 300D or 350D or 400D or 450D or 550D or 600D or 650D or 700D or 10D or 20D or 30D or 40D or 50D or 60D or 70D or 5D or 5DII or 5DIII or 6D or 7DII.5. Carefully welding, precise hole position, complete functions, corrosionresistant and wearresistant.Specification:Item Type: Lens AdapterMaterial: AlloyColor: As Picture ShownWeight: Approx. 40.0g or 1.4ozFit for Zeiss or Contax or Yashika CY LensFit for Canon EF or EFS Mount CameraFit for Canon 100D or 1l00D or 1000D or 300D or 350D or 400D or 450D or 550D or 600D or 650D or 700D or 10D or 20D or 30D or 40D or 50D or 60D or 70D or 5D or 5DII or 5DIII or 6D or 7DIISupport: Manual IrisSupport: all kinds of digital and some film machinesHow to use:1. Install the adapter ring on the lens:First put the corresponding lens on the slot of the adapter ring, align the white dot on the lens with the red dot on the front of the adapter ring, and then tighten it clockwise until it clicks, and it is installed in place .2. Install the adapter ring and lens on the camera as a whole:Turn off the power of the camera, align the mounting interface of the adapter ring with the interface of the camera, and align the red dot on the rear of the adapter ring with the red dot of the camera lens interface. Then, rotate the adapter ring and the lens in a clockwise direction until it clicks, which is in place.3. If you want to remove the adapter ring and lens from the camera, press the lens release button on the camera, and then rotate the adapter ring counterclockwise.Instructions for use of adapter ring:1. First, set in the camera menu: Turn on "Shoot without lens" or "Release shutter without lens" to use the adapter ring.2. Use LCD to focus, all are manual focus.3. Use the MF zoom function, 7 times or 14 times zoom to focus, to achieve the focusfunction.4. You can use M or A mode to shoot..Package List:1 x Lens Adapter