Speed Booster® User Manual (EOS M)

'Chip' Emulation Function

You may store the metadata of one manual focus lens in the non-volatile memory of EF-EFM Speed Booster®.

  1. Download and run Metabones App.
  2. Connect EF-EFM Speed Booster® to computer with micro USB cable (not included).
  3. Enter the name of the manual focus lens, its zoom range, and maximum/minimum aperture.
  4. Click the 'Set' button.

Press the button on the adapter to activate. The camera will show an aperture value instead of F00.

The 'chip' emulation function is cancelled when the lens is changed. Push the button on the adapter again to re-activate it.