Metabones release new firmware for EF-E Smart Adapter Mark IV which claims fix to FS7 issues

By associate editor Elliot Smith:

The Metabones EF-E mount Smart Adapter – now more compatible with the Sony FS7 camera

Metabones have released a firmware update for their Mark IV EF-E mount Smart Adapter. This should fix the iris control issues users have been experiencing when they use the adapter to mount Canon EF lenses on the Sony FS7 camera.

Specifically the update should stop the iris flicker when changing apertures that has made this combination of camera and lenses problematic. We haven’t had a chance to test the new firmware at Newsshooter yet but if it works as advertised this is only going to widen the appeal of the FS7. There are a lot of people with EF lens collections and the C300 Mark II is still several months away.

There are also fixes to image stabilisation in the new firmware. Users will now have the choice of whether to use the lens’ own IS system or the camera body’s IBIS sensor based stabilisation – this is probably of most relevance to Sony a7 II shooters at present but I suspect we will see it on other video capable cameras soon.

Full details from Metabones below and the firmware itself is available here.

From Metabones:

This information is for the following models:

EF-E Smart AdapterTM MARK IV (model number MB_EF-E-BM4) 


Name: Firmware update V0.41 for EF-E Smart AdapterTM 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

Eliminated 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.

Eliminated iris tick noise while zooming a variable aperture zoom lens in Green mode

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