Sigma macro on A7R problems

[pfogle]

Hi, I'm trying to use a 70mm Sigma macro using a Fotofiox pro Canon EF -> Sony E adapter. I'm having issues with the lens sometimes not talking to the body. It will take a couple of frames OK, then will just lock up, and I have to take the lens off to reset the body.

 

I think the weight of the lens is pulling the contacts apart, but I can't get my Canon lens (24-105, heavier than the Sigma) to repeat the problem.

 

Tried cleaning contacts etc.

 

Anyone seen similar issues? Any suggestion very welcome!

 

Phil

[xya]

I had plenty of issues with older sigma lenses for canon mount. these lenses gave an error code with genuine canon digital cameras. if you have access to a canon digital, check whether it works with canon.

[pfogle]

I had plenty of issues with older sigma lenses for canon mount. these lenses gave an error code with genuine canon digital cameras. if you have access to a canon digital, check whether it works with canon.

Both my lenses work fine with Canon. This is intermittent, and if the camera locks up, I can reset it by removing the lens, which causes the shutter to close as soon as the lens starts rotating in the mount.

 

I suspect software, I'll see if I can get hold of a different adapter.

 

cheers

Phil