Metabones Releases Smart Adapter IV Firmware Update 0.44


I strongly recommend this Firmware update for Sony a7II and a7RII users!

Well this is the FASTEST Firmware update in Metabones history! Metabones Firmware Update FW 0.44 fixes a bug with IS lenses found in 0.43 released just 3 days ago for its EF-mount Metabones Smart Adapter IV (Order here) and Speed Boosters through firmware update 0.44


Name: Firmware update V0.44 for EF-E Smart AdapterTM MARK IV and EF-E Speed BoosterTM ULTRA
Release date: 22 Sep 2015


• Fixed IBIS switch issue on A7II and A7RII with IS lenses introduced FW 0.43


Metabones Smart Adapter IV (EF-E Smart Adapter MARK IV (Order Here)
Metabones EF-E Speed Booster ULTRA 0.71x (Order Here)

Metabones Smart Adapter IV (Order Here) and Metabones EF-E Speed Booster ULTRA 0.71x (Order Here)

Get the latest Firmware update for Metabones EF-E Smart Adapter Mark IV: MAC | WIN



Apple Mac OS X 10.9 Mavericks or later


Windows Vista SP2
Windows 7 SP1
Windows 8
Windows 8.1
Windows 10 (Firmware version 43)


• 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 camera and lens when performing the firmware update.
• Make sure that you are logged on as a user with administrative rights.
• Read the disclaimer and click to agree to the terms and conditions. Then, click on the Download button.
• The download of the [MAC: MetabonesApp.dmg] or [WIN: MetabonesApp.exe] file will start.
• 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 Adapter MARK IV.
• Close all currently running programs on your computer.
• Double-click the [MAC: MetabonesApp.dmg] or [WIN: MetabonesApp.exe] download file to start the Metabones App.
• Connect your the Smart Adapter MARK IV to the computer by using the USB-MicroUSB cable that came with your Sony camera to USB port behind the adapter’s lens release lever.
• Then, follow the instructions in the Metabones App to update the firmware.


• Only connect the adapter – REMOVE the camera and lens
• Once adapter connected via USB, the app will tell you if an update is available.
• If an update is available, follow the prompts:
• Unplug USB – Press and Hold Button (center of photo above) – then reconnect USB to start the update.
• DO NOT disconnect until the Update is finished.

You’ll get a screen prompt telling you once Firmware has successfully updated and you’re done.

PLEASE NOTE: I strongly advise using the USB-MicroUSB cable supplied with your Sony camera as other cables may not transfer data properly.


Name: Firmware update V0.43 for EF-E Smart AdapterTM MARK IV and EF-E Speed BoosterTM ULTRA

Release date: 18 Sep 2015
Benefits and improvements:
• ILCE-7R2 (A7RII) support
• Autofocus improvements
• Fixed issue when Aperture Preview is assigned on A7 series to Focus Hold button (WO button of the adapter)

Limitations include:
• During video recording there is only slow contrast-detect AF (Sony).
• Continuous AF may have unsatisfactory performance (phase-detect AF) or not supported (contrast-detect AF).

Firmware update V0.41 for EF-E Smart Adapter MARK IV

Release date: 1 Jun 2015
Benefits and improvements:
• User may choose between lens OIS and IBIS using the lens’ IS switch (except for some Tamron lenses). If the lens’ IS switch is ON, lens OIS is used and IBIS is turned off automatically. If lens’ IS switch is OFF, IBIS is used instead. To turn off all IS, hold down the WO button on the adapter while switching the lens’ IS to the OFF position.
• IS is always turned on during magnified focus assist for ease of manual focusing
• Added autofocus support for some legacy lenses on A7 series
• Eliminates iris flicker when opening up the iris from a slower aperture to a faster aperture in Green mode on FS series, NEX-VG series and A7 series in movie mode.
• Eliminates iris tick noise while zooming a variable aperture zoom lens in Green mode

Firmware update V0.40 for EF-E Smart Adapter MARK IV

Release date: 3 Feb 2015
Benefits and improvements:
• series lenses. You may for example assign “Aperture Preview” to the the “Focus Hold” button on A7II and get the same DOF preview function as on a Canon DSLR. Image Stabilization ON/OFF status is displayed on A7II as the SteadyShot icon. “‹
• Adds support for Sony A7s silent shutter mode.
• Fixed Sony A7s intermittent startup issue.
• More detailed EXIF data.
• Reliability improvements with some Sigma and Tamron lenses.
• Fixed distance display (in Advanced mode) on VG, FS and A7 series.
• Fixed EF70-200/2.8L IS II USM’s IS on/off switch intermittently inoperative issue.
• Fixed issue of EF40/2.8 STM being wrongly identified as an OSS lens.
• Fixed NEX-5N becoming unresponsive issue when movie capture started

Firmware update V0.39 for EF-E Smart Adapter MARK IV

Release date: 29 Dec 2014
Benefits and improvements:
• “‹Improves Sony A7S compatibility

Firmware update V0.37 for EF-E Smart Adapter MARK IV

Release date: 20 Nov 2014
Benefits and improvements
• Improves stability with some lenses

Firmware update V0.36 for EF-E Smart Adapter MARK IV

Release date: 31 Oct 2014
Benefits and improvements
• Fixes Zeiss ZE lens stability issue with adapter firmware version 0.33 and version 0.34″‹

Firmware update V0.34 for EF-E Smart Adapter MARK IV

Release date: 8 Oct 2014
Benefits and improvements
• Bug Fix and Improve the performance.
• Fix Auto-Magnify/MF function on advance mode.

Firmware update V0.32 for EF-E Smart Adapter MARK IV

Release date: 14 Aug 2014
Benefits and improvements:
• Sony A7S compatibility

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3 thoughts on “Metabones Releases Smart Adapter IV Firmware Update 0.44”

  1. Brian – Do I need to install previous updates in order, or just this one? I missed the 0.43 update. Thanks for posting!

  2. Thank you sir! Just did a bunch of testing today. I can’t say I noticed much of a speed increase on my Canon 24-70mm 2.8 IS L (version 1), and my 70-200mm 2.8 IS L (version 1). However, there is a huge difference in the 85mm (USM f1.8)! It went from unusable (in AF mode), to pretty fast! Great update!

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