Adapting G lenses to m4/3

[GiannyM]

I never adapted any lens on any camera before.

I just bought an E-M5 II and was attempting to make the Tamron 70-300 work on it using the Metabones N/F-M43 mount my wife has. It shows encouraging signs for stabilization and focusing manually but the aperture remained stubbornly shut to the smallest aperture possible. Easy to guess that this was not the right adapter.

Would something like this work? If so can you explain to me how it would manage to open wide the lens iris?

TIA.

 

[Heritage Cameras]

I never adapted any lens on any camera before.

I just bought an E-M5 II and was attempting to make the Tamron 70-300 work on it using the Metabones N/F-M43 mount my wife has. It shows encouraging signs for stabilization and focusing manually but the aperture remained stubbornly shut to the smallest aperture possible. Easy to guess that this was not the right adapter.

Would something like this work? If so can you explain to me how it would manage to open wide the lens iris?

Yes, that one should do the job.

Nikon G adapters have an extra ring you turn to adjust the aperture on the lens, and you can turn it from fully open to fully closed, or (with care) anywhere in between. The settings aren't marked, though, and many of these adapters don't have click stops. You can use metered manual or aperture priority auto exposure modes on the camera.

I haven't used this adapter myself, but K&F Concept has a good reputation for the price.

Hope this helps.

 

[GiannyM]

I never adapted any lens on any camera before.

I just bought an E-M5 II and was attempting to make the Tamron 70-300 work on it using the Metabones N/F-M43 mount my wife has. It shows encouraging signs for stabilization and focusing manually but the aperture remained stubbornly shut to the smallest aperture possible. Easy to guess that this was not the right adapter.

Would something like this work? If so can you explain to me how it would manage to open wide the lens iris?

Yes, that one should do the job.

Nikon G adapters have an extra ring you turn to adjust the aperture on the lens, and you can turn it from fully open to fully closed, or (with care) anywhere in between. The settings aren't marked, though, and many of these adapters don't have click stops. You can use metered manual or aperture priority auto exposure modes on the camera.

I haven't used this adapter myself, but K&F Concept has a good reputation for the price.

Hope this helps.

 

[Heritage Cameras]

My problem now is that the iris on the Tamron is fully closed letting only precious little light come through. Do you mean that the adapter can act directly on the lens diaphragm?

Yes, that's how it works. There's a tab inside the adapter connected to the ring, that moves the auto diaphragm lever on the lens. You can see this working on your lens by pushing the lever across with your finger.

 

[GiannyM]

My problem now is that the iris on the Tamron is fully closed letting only precious little light come through. Do you mean that the adapter can act directly on the lens diaphragm?

Yes, that's how it works. There's a tab inside the adapter connected to the ring, that moves the auto diaphragm lever on the lens. You can see this working on your lens by pushing the lever across with your finger.

--
Dave, HCL

Got it! Thanks!

Also I see that the little tab runs only a short distance. I was wondering why the ring on the adapter had to move so little to cover 7 stops.

Regards,

Jean

--
Luck should never be left to chance.

 

[Heritage Cameras]

Yes, that's how it works. There's a tab inside the adapter connected to the ring, that moves the auto diaphragm lever on the lens. You can see this working on your lens by pushing the lever across with your finger.

Got it! Thanks!

Also I see that the little tab runs only a short distance. I was wondering why the ring on the adapter had to move so little to cover 7 stops.

Regards,

Jean

You're welcome – hope it works out for you.