Lens calibration (Canon EF)

It may be necessary to calibrate a Canon EF-Mount lens when it is used for the first time. The calibration will be stored in the Metabones EF lens Speed Booster / Smart Adapter's non-volatile memory when the lens is left on the camera and the camera's power is shut off. The calibration takes place just by using the lens normally with no special procedure required. To manually calibrate the lens, follow these simple steps.

  1. Turn on your camera.

  2. Attach lens to Metabones Speed Booster / Smart Adapter and attach adapter to camera. (The order doesn't matter.)

  3. Point at a smooth surface with no contrast, and let autofocus hunt one round-trip between infinity and closest focusing distance.

  4. If using a Sony camera which supports phase-detect autofocus, autofocus on a subject with high vertical contrast.

  5. If it is a zoom lens, slowly zoom to the longest zoom position.
     

  6. Zoom lens back to the widest zoom position. Repeat the zooming once.

  7. Turn off the camera.

  8. Wait at least 5 seconds. You will hear a "tick" sound from the lens when it parks at minimum aperture, or a small 'thud' sound from your Sony camera if it is equipped with IBIS, to confirm that the camera has shut down successfully. Your lens' calibration data is now stored in the non-volatile memory of your Metabones Smart Adapter.

  9. Remove lens from the camera.