Works OK for Canon and Tamron lenses
I know that it says that it is for Sigma Canon lenses only, but others on Youtube have said that it worked for their Canon lenses, so I gave it a try.
First, you have to update via USB the actual device, and this is a bit tricky. You have to mount the lens on the mount before you ever even look at mounting anything to the camera. The device seems to know which lens it is attached to, and when you update the mount to USB, it has an idea of which lens it is. Then you update the mount, and now you can put the mount on the camera. I have a Sony a6400 and tried to see if things would work before any update,and the results were very disappointing. Then I did things correctly, and now the lenses are OK, not as good as a Sony lens but it does auto focus and sometimes is a bit twitchy, but it give me access to two lenses that I did not have before and it does actually focus somewhat quickly.
I have a Canon EF 28-135mm f/3.5-5.6 IS USM, and a Tamron AF 28-300mm f/3.5-6.3 XR Di LD Aspherical (IF) Macro that the device works for.
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