Metabones Releases Firmware Update 0.41 for Smart Adapter IV


[Update: After testing this update on Sony a7II and a7RII, I STRONGLY recommend this FW update for Sony a7II/a7RII]

Metabones has released Firmware Update 0.41 for their Metabones Smart Adapter IV (Order here). This is a major firmware update for Sony a7II and a7RII because it addresses incompatibility issues between Canon IS lenses and Sony a7II camera IBIS. Prior to this firmware update, Metabones Smart Adapter IV (and other Canon smart adapters) would over-compensate for image shake by using both Canon lens IS and camera IBIS.

With this update, users can use the lens IS switch to choose between using lens-based optical Image Stabilization and Sony a7II / a7RII IBIS:

• If the lens IS switch is ON, lens-based optical IS is used and camera IBIS is turned off automatically.
• If the lens IS switch is OFF, the a7II/a7RII camera-based IBIS takes over image stabilization.
• To turn off all IS, hold down the WO button on the adapter while switching the lens’ IS OFF.

All Metabones Smart Adapter IV users will want to run this firmware update since it also adds autofocus support for some additional Canon legacy lenses on Sony E-Mount cameras including Sony a7, a7R, a7S, a7II, a6000, a5100, a5000 and NEX.

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


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



Apple Mac OS X 10.9 Mavericks or later


Windows Vista SP2
Windows 7 SP1
Windows 8
Windows 8.1


• 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.


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

Related Posts:

Metabones Smart Adapter IV for Sony A7/A7R/A7S/A7II
Photography Gear Guide: Sony Lens Mount Adapters
Guide to Sony A7 / A7R / A7S / A7II Lens Mount Adapters – Part 1

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8 thoughts on “Metabones Releases Firmware Update 0.41 for Smart Adapter IV”

  1. You seem to be the “go to” guy for Sony mirrorless stuff!

    I’m considering upgrading from a Canon 5DMK II to the new Sony A7R II, instead of to the Canon 5DSR. I am presently able to use my Canon 2X teleconverter on a Nikon 85mm tilt shift lens (first non-G version) for pretty good results, making it a 170mm tilt shift macro lens. I use a Fotodiox adapter on the lens (Nikon F Lens to Pro Canon EOS Lens Adapter with Dandelion AF Confirmation Chip) from B&H. It is the only adapter that will allow a Canon teleconverter with a non Canon lens and cause the camera to lock up.

    If I get the Sony camera, can I still use this? (Fotodiox says that this adapter will not work on the Canon 5D MKIII). Or is there another way to make this combination work? I find the Canon 2X teleconverter to be better than the Nikon, and the Nikon 85mm tilt shift is much better than the Canon 90mm tilt shift. Also, how would my Kenko extension tubes work with the Sony? The extra adapter needed for Sony seems like it could be problematic with some combinations, but the better image quality might be worth trying to figure it all out and get it to work?

    Thanks so much for any suggestions.

  2. Correction to last post: The Fotodiox adapter is the only adapter (that I have found) that will NOT cause the camera to lock up.


  3. Pingback: Canon EF to Sony E-Mount Smart Adapter Compatibility Guide

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  6. That’s a lot of work you’ve done here, thank you!
    My use case is a switch from Canon to a7r3 but I want to keep all my sigma art ef lenses for dark jazz club portraits.. Your site was the only one to say eye focus isn’t supported, which was interesting.
    Have you tested sigma’s own Sony -> ef adapter?

    1. It was not supported with update 0.41 mentioned here, but added in a later update.

      Here’s the deal, you “can” enable Eye AF for certain lenses (stills only – not video) with either Metabones Smart Adapter IV/V or Sigma MC-11 (on sale now). If you only have Sigma Art EF lenses (not Canon) I’d suggest you go with MC-11. If you have a mix of glass, go with Metabones.

      Bear in mind that neither Sigma or Canon DSLR lenses were designed Eye AF. DSLR lenses simply don’t match Sony FE glass for Eye AF speed. In other words, yes, you may enable Eye AF with certain adapted lenses – it’s just not as good as native glass.

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