Metabones Smart Adapter Firmware Update v58 Improves Video Auto Focus


Metabones Firmware Update v58 improves Advanced mode continuous video auto focus with Metabones IV and V Smart Adapters and Speed Booster Ultra and adds custom function to Metabones App which allows users to configure video AF speed/smoothness/noise level.

[Please Note: there’s often a brief break-in period following adapter firmware updates where the adapter must re-learn the settings for each lens and store those settings into memory.]

Applicable Products:

Name: Firmware update V0.58 for EF-E Smart Adapter MARK IV/V and EF-E Speed Booster ULTRA
Release date: 12 Mar 2018

Benefits and improvements:

Continuous video AF performance improvement (works in Advanced mode only)

Addition of a custom function to Metabones App which lets the user to configure video AF speed/smoothness/noise level.

EXIF improvement Improved operation with Kenko Pro300 1.4x and 2x (blue dot) teleconverters.

Fixed a rare phenomenon where an old model camera with Mark V, Speed Booster ULTRA II, CINE Smart Adapter or CINE Speed Booster ULTRA with the IBIS switch at the OFF position may leave the LED indicator on in blue.

In Green mode, you may now attach an EF Extender first and turn on the camera before attaching a compatible EF telephoto lens. In advanced mode, you must not leave the EF Extender without lens while the EF Extender is attached.

If you have an early production CINE Smart Adapter or CINE Speed Booster, the manual lens EXIF definition custom function (preset using Metabones App) will no longer activate automatically. Press the WO/CF button on the adapter to activate.


Operating Systems; The latest version of the firmware update is compatible with Apple Mac OS X version 10.9 Mavericks or later


The latest version of the firmware update is compatible with the following hardware: USB 2.0 port




Important notes:

    • When performing the firmware update, please don’t disconnect the USB cable, otherwise, the adapter may become inoperable due to the sudden power shutdown
    • Don’t connect the adapter to any cameara and lens when performaing the firmware update.

How to download the firmware updater:

    1. Make sure that you are logged on as a user with administrative rights.
    2. At the bottom of the page, read the disclaimer and agree to the terms and conditions by clicking on the checkbox. Then, click on the Download button.
    3. The download of the [MetabonesApp.dmg] file will start.
    4. Save the file to the desktop of your computer (recommended).


Once the file has downloaded successfully, you’re ready to upgrade the Firmware update for the Smart AdapterTM MARK IV.
STEP 1: START UP THE Metabones App

    1. Close all currently running programs on your computer.
    2. Double-click the [MetabonesApp.dmg] file you downloaded to start up the Metabones App.
    3. Connect your the Smart AdapterTM MARK IV to the computer by using the USB-MicroUSB cable.
    4. Then, follow the instructions in the Metabones App to update the firmware.


Order Metabones Canon EF/EF-S Lens to Sony E Mount T Smart Adapter V
Order Metabones Canon EF/EF-S Lens to Sony E Mount T CINE Smart Adapter V
Order Metabones Canon EF Lens to Sony E Mount T CINE Speed Booster ULTRA 0.71x (Fifth Generation)
Order Metabones Canon EF to Sony E-Mount T Speed Booster ULTRA II 0.71x (Fifth Generation)


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4 thoughts on “Metabones Smart Adapter Firmware Update v58 Improves Video Auto Focus”

  1. I have the Metabones V, for Canon to Sony A7 III. It’s now December 2018 and there is a new release however, none of the downlinks work on Mac or PC for me. Has anyone managed to obtain a download?

    1. I just downloaded the current Firmware v59 for Mac without any problems. Nice thing with Metabones is they always use the same link to the current version of their firmware.

      Did you check the box beside “I have read the above End User License Agreement (EULA) and agree to the terms and conditions” ?

  2. Hi Brian, i have an a6300 + metabones IV and two canon lenses for now

    – the first is a Canon 10-18 IS STM

    – the second is a Canon 55-250mm IS STM

    both works good with v58, but sometimes the 55-250mm can’t get to focus, so i need to turn off and turn on the camera and it works again, the new firmware release notes don’t tell much about what is new.

    We know that hardly a new release fix only 1 or 2 things, usually it fixed a lot more but the release note lacks these info.

    So did you discover some new features or some fix, or what did you notice with this new firmware, that was not in the previous one ?


    1. It takes me up to two full days to test all the Canon fullframe lenses with the leading two adapters. I intended to do that ONCE. But because Metabones has been so proactive with firmware updates, I have tested four separate times but I’m now officially D-O-N-E.

      Retesting adapters simply eats up too much time and frankly most native Sony lenses out-perform Canon both in terms of AF as well as optical performance. While I certainly understand the appeal of adapting existing lenses when switching to Sony, the truth is that you’re not getting the most out of your camera.

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