A7Rii not recognizing Canon Lenses with Metabones but a5000 does?

I am having trouble getting my Metabones Mark IV adapter to work the the a7Rii.  When mounted on a a5000 body it works fine, the camera sees the lens and the electronics in the lens are functional.  But when put on a A7rii or FS700, the camera does not recognize the lens, Manual Focus is indicated and the aperture cannot be adjusted.

The Metabones adapter I am trying to use is "Canon EF to Emount Mark IV" Model: MB_EF-E-BM4

The Metabones adapter does have the latest firmware.  These are the lenses I have tried so far that function fine on the a5000 (with sloooow autofocus, but do function), but are not recognized by the a7rii or FS700 bodies:
-EF 35mm f/1.4L
-EF 70-300mm f/4-5.6L

The cameras both autofocus fine with FE lenses and also with A-mount lenses with the E-A mount adapter.

Could there be a camera setting I am missing somewhere?  I appreciate any advice!

I spent some time comparing a Metabones 4 vs the Viltrox adapter on an A7RII and found that the Metabones was more buggy without providing any benefit in performance. At one point the Metabones just completely stopped auto-focusing my Sigma 50 Art lens. The current firmware for the Metabones was released before the A7RII was available and wasn't tested with the camera so Im going to stick with a cheap adapter until the Metabones is updated.

Nope, I wasn't getting any iris value at all.  I took it on and off the FS700 and A7RII numerous times with no change in how it acted.  After reading your reply I focused more on the contacts, I tapped on it and tried to move it back and forth a bit and suddenly the iris value displayed.  So that was the issue.

It looks like the metabones adapter I have must have its tolerances slightly off.  Works fine on the plastic mount body but on the metal mounts things don't line up quite right.

Thanks for the reply, was helpful to know that I wasn't missing anything and to just pay attention to the contacts.

EpyonXero wrote:

I spent some time comparing a Metabones 4 vs the Viltrox adapter on an A7RII and found that the Metabones was more buggy without providing any benefit in performance. At one point the Metabones just completely stopped auto-focusing my Sigma 50 Art lens. The current firmware for the Metabones was released before the A7RII was available and wasn't tested with the camera so Im going to stick with a cheap adapter until the Metabones is updated.

Thanks for the response!  Yes, it seems to be either buggy or the contacts not quite lining up correctly on the cameras with metal mounts.  I will have to see how it works out, might just have to replace the Canon glass with native Sony lenses if its not going to be reliable.

I emailed Metabones Support Team and they told me they were testing the A7RII, new firmware will come soon. See if you can wait for it.

You indicated that you were using latest Metabones firmware version ... what version number are you using?

jruff wrote:

You indicated that you were using latest Metabones firmware version ... what version number are you using?

I'm using version .41...I downloaded their utility and it told me I already had the latest version.  I found if I really torque the lens on tight that it comes alive and starts working.  However I missed several shots earlier today due to it suddenly losing connection with the camera.  I think I received a defective adapter and am going to return it.

I had the same issue when I first put the adapter on the camera.

I have discovered that the contacts do not align properly on the camera body and the adapter if you lock the adapter in place. I discovered that I'd u release the lock and twist it back ever so slightly it works and the camera recognises the lens. I am in contact with Metabones right now about the issue. I do think k that there might be a slight difference in the contact position between the A7RII and previous A7's. According to Metabones the A7RII is not fully supported yet.

the905sDW wrote:

I had the same issue when I first put the adapter on the camera.

I have discovered that the contacts do not align properly on the camera body and the adapter if you lock the adapter in place. I discovered that I'd u release the lock and twist it back ever so slightly it works and the camera recognises the lens. I am in contact with Metabones right now about the issue. I do think k that there might be a slight difference in the contact position between the A7RII and previous A7's. According to Metabones the A7RII is not fully supported yet.

Very interesting to hear the A7RII is not fully supported yet>  Thank you for the response, that is exactly the issue I was experiencing. I returned the Metabones adapter and am going to wait a bit for a solution.  If you think of it, please reply with an update if you hear anything further back from Metabones about a solution.  Thanks again!

I will definitely keep u updated. I am still waiting to hear back from Metabones directly of my findings. This weekend I might return to the store and get an exchange for a new adapter, test it there to see if it was just that particular one.

Other videos of people on YouTube adding an adapter and Canon. Lens to their Sony all works just fine, and theirs all clicked into proper place. Hope I just have lemon

Metabones contacted me back today, told me to exchange my adapter for a new one. They told me their team is still working on firmware for the A7RII.
I do think personally this is a hardware fault however.
I hope they test this out! Fingers crossed on a new adapter.

the905sDW wrote:

Metabones contacted me back today, told me to exchange my adapter for a new one. They told me their team is still working on firmware for the A7RII.
I do think personally this is a hardware fault however.
I hope they test this out! Fingers crossed on a new adapter.

Yes, sounds exactly like the hardware issue I had.  Hope the new adapter works out!  Thanks!

This is in line with my findings - and I am now convinced that there is a physical placement difference of the electronic contacts on the A7RII vs the other A&'s, thus people having issues with the adapter not registering all together - try loosening the adapter a micrometer and see if the camera registers the lens.

the905sDW wrote:

This is in line with my findings - and I am now convinced that there is a physical placement difference of the electronic contacts on the A7RII vs the other A&'s, thus people having issues with the adapter not registering all together - try loosening the adapter a micrometer and see if the camera registers the lens.

Grateful for this thread. I just received my mb iv and new A7R2. I'm having the exact same issue. Before I found this thread, I thought it was a firmware issue (updated mb to 0.48, and A7R2 to v3.0). No luck. Read this thread and tried some of the physical adjustment suggestions. Nothing I tried helped and I'm not willing to force anything and risk damage to the camera. Returning it and will see if a different unit works.

Update: Having read about so many problems with the MB iv (including local camera store that stopped carrying them because of so many returns), I decided to try the Fotodiox adapter instead. One quarter the cost of the MB and worked right out of the box -- lens recognized by camera, autofocus worked.

Steve Bonario wrote:

the905sDW wrote:

This is in line with my findings - and I am now convinced that there is a physical placement difference of the electronic contacts on the A7RII vs the other A&'s, thus people having issues with the adapter not registering all together - try loosening the adapter a micrometer and see if the camera registers the lens.

Grateful for this thread. I just received my mb iv and new A7R2. I'm having the exact same issue. Before I found this thread, I thought it was a firmware issue (updated mb to 0.48, and A7R2 to v3.0). No luck. Read this thread and tried some of the physical adjustment suggestions. Nothing I tried helped and I'm not willing to force anything and risk damage to the camera. Returning it and will see if a different unit works.

Update: Having read about so many problems with the MB iv (including local camera store that stopped carrying them because of so many returns), I decided to try the Fotodiox adapter instead. One quarter the cost of the MB and worked right out of the box -- lens recognized by camera, autofocus worked.

Yup, am having same issues. Was contacted by my supplier that the Metabones MK4 is NOT suited for the A7R2 and is shipping me "Sigma MC-11", afterwards I'll be sending back the MB MK4 for a refund.

(Brand new A7R2 and MB MK4)

btw... the Sigma is like $200 cheaper (Can)