Ok, I know y'all don't like the ‘game changer' phrase but that's what some people are calling this Sigma MC-11 Adapter for Sony E-Mount cameras.
But I think based on my investigations, it should be called “limited” because it only applies to Sigma and Sigma EF Lenses. You can't use your Canon EF lenses or any other branded lenses either.
The game changer (and you'll see it in the Dpreview video below) is that it is the first adapter to bring full autofocus to Sony E-Mount bodies. While the Metabones adapters do work, they're limited in AF functionality. So if you watch the demos, you'll be very impressed with the capabilities demonstrated and if you own Sigma lenses, you'll be very happy!
While the rest of the lens world (Canon, Tamron, etc) sits and prays for updates as this would indeed be something many people would love to have. I've tried the metabones on a Sony A7s with my EF lenses and the AF was just not suitable for my needs.
More vids about the MC-11
Last week Sigma announced several new products for the CP+ show which ended early this week. One product that was a bit of a surprise was a new MC-11 adapter which will allow DSLR lenses to operate with full autofocus functionality on Sony full-frame and APS-C mirrorless bodies.
The video above, shot by the guys from DPreview takes a look at this interesting adapter which brings superior AF functionality to the Sony E (and FE) cameras with 3’rd party lenses.
The only (major) drawback of this adapter seems to be that it will only work with Sigma glass (in either Sigma mount or EF Canon mount) but not with other manufacturer’s glass (Canon/Tamron/Tokina etc.) are not going to work and this is a very big problem.
As for the other capabilities of the MC-11 – the unit has an integrated LED display and it can keep both autofocus and auto-exposure as well as transfer EXIF data to the camera and support Sigma’s USB dock.
If you do have a nice collection of good Sigma lenses for Canon for example – the adapter can be an interesting preposition. It is also not very expensive at $250 (it is still not available for purchase though but you can pre-order).
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Original source: A Look at Sigma’s MC-11 Adapter for Sony E-mount Cameras