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ARRI EF Mount (LBUS) for large-format and Super 35 cameras

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ARRI has officially announced its EF Mount (LBUS) which allows users of the ALEXA Mini, Amira, and ALEXA Mini LF to take advantage of Canon EF mount lenses.


  • Use EF mount lenses with ALEXA Mini LF, ALEXA Mini, and AMIRA
  • Wider light baffle covers large-format and Super 35 sensors
  • Extra LBUS connector frees up EXT connector on Mini LF and Mini
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ARRI has redesigned its EF mount with a wider light baffle and LBUS connector, allowing it to cover the large-format sensor of the ALEXA Mini LF, as well as the Super 35 sensors of the ALEXA Mini and AMIRA. 

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On the Mini LF and Mini, it also provides an LBUS connector, which is not supported on the AMIRA. The previous ARRI Lens Mount will remain available for the AMIRA.

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The use of EF mount lenses on digital cinema cameras has been a popular choice for budget-conscious productions. Their mechanical design allows the use of external lens motors connected to the mount’s LBUS connector if you are running cine-style EF mount lenses.

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You can also remotely control Canon EF mount lenses via ARRI ECS hand units like the wireless WCU-4 and SXU-1 or opt for wired control using the OCU-1 and/or Master Grips.

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The new mount allows users to set the lenses internal iris motor and power the image stabilization built into some telephoto EF mount lenses.

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Price & Availability

Availability is planned for November 2020. The retail price is $1,755 USD.

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