Metabones releases a major firmware update for EF-E Smart adapter and for the EF-E Speed Booster. You can download them here:
Windows version
Mac version
- Benefits and improvements:
- Faster wake up from sleep after auto power off.
- A7RII PDAF speed improvement for most lenses.
- Fixed an intermittent issue with the camera’s MENU exiting on its own when pressed for the first time.
- Corrected identification of Sigma 35/1.4 and Sigma 30/1.4 when APS-C/Super35 capture is set to “Auto”.
- Fixed an iris issue with Tamron 70-200/2.8 VC A009 after a power off/on cycle.
- Decreased IS motor noise when the camera is turned off.
- Autofocus support for ILCE-7SM2 (A7sII).
- Fixed iris operation of Tamron 28-300VC(A20) in Advanced Mode.

14 Responses
What happened to that Nikon mount to e mount af adapter?
Been a couple of months this since Matt granger had that pre production thing in his office.
Wondering same thing.
Don’t know, maybe the feedback was that it is not good? Nikon mount is certainly MUCH more complex to adapt than EF.
I thought with their own adapter already working it could be easy to reverse engineer and adapt to other systems.
https://www.youtube.com/watch?v=BbkOd8yT5qY
F-Mount is dead!! There you have it!
That’s too bad because Canon glass is shit.
The dev was about to bring it into production when A7rII went out with totally different AF protocol for third party lens, so he had to redo some design.
But don’t worry, there is discussions on xitek and dev is apparently alive and project is progressing, and the testing result seems close to finish.
“Decreased IS motor noise when the camera is turned off.”
Translation: We screwed up all along and our adapter wasted your precious battery life even while you had your camera turned off (all these years?).
I recommend always taking the Metabones claims with a grain a salt.
Here is a test from 9 months ago:
https://www.youtube.com/watch?v=TTPM5U6fBDM&feature=youtu.be&t=129
Metabones had buggy Aperture adjustments whereas the standard cheap commlite adapter worked as it should out of the gate without firmware updates.
I wouldn’t be surprised if functionality with A7Sii worked out of the gate with the cheaper Commlite/Fotodiox adapters as well, but with Metabones it’s exaggerated as completely new feature.
So take the stuff they say with a grain of salt.
If the adapter will need to be updated for every new body, at some point they will drop support (having newer version), and it be just a paperweight.
Why would that make anything easy to reverse engineer? Nikon knows the protocols on both sides but no one else does unless they’ve REd it.
Same deal as Sony’s EA1/EA3 adapters.
In the case of Nikon-to-Sony adapters, the people making the adapters have no knowledge (other than via RE) of BOTH sides of the mount.
Unless you’re talking about something crazy like creating a Nikon 1 to E mount adapter and using Nikon’s adapter to handle the mechanical difficulties – this is impossible since Nikon 1 has a shorter flange focal distance than E.
Slight speed improvement, still hunting a bit on long lenses.
How long before they hunt? 85mm, 135mm, 200mm or 400mm? Thanks!
I have the Mark IV adapter with a brand new A7sII. I updated the firmware the day it came out. Autofocus with Canon 50mm or Tamron 17-50mm is unusable. I shoot 90% video so that’s not such a big deal. What’s more annoying is that I have to disconnect the lens if the camera is turned off and on again—otherwise they won’t communicate and I just get a black screen. Firmware update didn’t change this.
Quick update: I installed the new firmware (23 November) and AF is still hunting. I could not recommend this for still shooters using the A7sII and Canon glass.