Sigma MC-11 Adapter to Sony e Mount

2 questions:

1. Is there one and one only version of Sigma MC-11 Adapter? Because even with lens, the likes of Sigma 24-70mm F2.8, the non ART version, there are 2 of them. It just confuses the hell of me.

2. Is it true that Auto Focus becoming an issue with unsupported Sigma Lens combined with MC-11 Adapter in Sony A7ii? Some say AF is significantly slow to a point that it's unusable, however some say AF is at the same speed or even faster than native emount lens.

can't answer number 1, I've only seen one version out there but that doesn't mean there isn't a second.

On number 2, the answer is it depends. Each lens behaves differently when adapted. Unless it is specifically an MC-11 teamed lens, results will all over the place. Some lenses you hardly notice the difference. Others, they are unpredictable. I highly doubt any are faster than native, but who knows. It's unlikely.

EDIT

I have the MC-11, the normal metabones, and the Metabones speed booster. I use the speed booster the most on my a6300..... love the extra stop of light.

I know that this is an older thread but, I thought that I would throw in my two-cents.

There is only one MC-11 adapter but, Sigma has issued firmware updates... These may or may not help the AF of whatever lens you are using.

The MC-11 works better on some lenses than on others, and on some Canon lenses, it doesn't seem to work at all.

Additionally, not all Sony mirrorless cameras work equally well using lenses adapted with the MC-11. From my research, the A7iii and A6500 may interface better with adapted lenses than older model cameras.

However, I originally purchased my A6500 on eBay along with an MC-11 adapter with the expectation that I could use my Canon glass but, the native Sony lenses work so much better on my A6500 that I have just about stopped trying to use the Canon glass on my Sony...

Putting in my $0.02 as well.

Having been able to use both and multiple sony cameras before buying my own, simplified:

1. There is one version of the MC-11 for the sony. They have a version that works better with the sigma lenses that you have for sony and the other that works well for everything else however, its not a big enough difference (this is all in my opinion) to get both. I find it good enough to just get the canon one which works fine with the canon/sigma setups. However do know that if you are completely switching over, sigma has a plan that you can send in your sigma lens, pay a lower fee and they will send you the same lens but for the other mount which would be far better than the adapter.

2. Having adapters will always have focusing issues as you are introducing a "middleman" into the focusing equation. It really depends what you shoot. If you need servo/continues focusing, using an adapter will not be your friend, but portraits, landscapes, etc that dont move much, itll be perfectly fine and work as long as its not in very low light. These adapters dont do too well in low light due to that middleman issue. Remember, the camera has to tell the adapter where to focus, then the adapter has to translate it to the lens, by then, the focus is already off a bit if moving.
You wont be able to beat native even with 3rd party lenses BUT 3rd party (Sigma, tamron, etc) do get really close. I havent had an issue with 3rd party to where I NEED a sony lens.
Though I do have the metabones adapter after trying a few, that I use for my canon 85mm 1.8 and 70-200mm. The adapters work best with good lenses. Typically, L lenses or primes.

Hope this makes sense and helps. Best of luck


Oh and most of my testing was done with a A7Rii and a7riii.

There is only 1 MC-11 but it does have two different versions, Canon EF mount and Sigma SA mount so make sure you buy the right version.

I used the MC-11 with Canon lenses and not Sigma but most lenses performed well. It is very dependent on the particular lens and the AF in the A7II will not perform as well as the newer gen 3 bodies.