Sigma MC11 Adapter REVIEW


Make shure to subscribe to my YouTube channel to be one of the first to know when a new video is online!


The Sigma MC11 Adapter was announced first on CP+ in March, 2016. My and and others hope was that Sigma would finally announce their great and affordable ART lenses in FE mount for us Sony users, but Sigma decided to go with the MC11 Adapter Solution to use their excellent Sigma Canon mount  or Sigma mount lenses on Sony E-Mount Cameras like the A7, nex, a5000 and a6000 series.

Since the MC11 Adapter was available a lot of reviews have allready been written, but better late than never i guess 🙂 So here is my complete real world experience with this Adapter + the Sony A7II!

Firmware Updates via USB

The great thing about this adapter and also the Metabones Mark 4 is that it has a USB port, you can download the Sigma software from the Sigma website plug in the USB Cable that came with it and connect it to your PC or MAC. And this is the first thing you should really do, make shure that the latest firmware is on the adapter, mine allready came with the latest Firmware 1.01.

With the Sigma software you can update the Firmware of the MC11 Adapter, so it is future-proof. Sigma can add new lenses that are supported via Firmware and improve the performance of the adapter.

What else can be done with this USB connection? Well of course, hackers / modders could hack this adapter and for example make more Canon lenses  or Canon Mount lenses work with it or even add Eye AF for Canon lenses and other features. It happend with cameras, why not with adapters?

Buildquality + Features:

SAM_0303 SAM_0308

First of all the good news, the Sigma MC-11 Adapter features flocking in its interior to help prevent internal reflections, so regardless on which F-Stop your on you will not have any lightleaks in the corners like with some cheaper adapters that don´t include complete flocking.

The construction of this adapter is excellent, its made completely out of metal and it also has metal mounts, the Adapter fits the A7II very well and its not making any unpleasent noise when you mount your lenses on. The adapter holds the lenses very safe and when you hold the adapter in your hand first thing you will notice is that it´s buildquality is very solid.

Status LED on the MC11 Adapter:

The Sigma MC 11 Adapter features a LED on the side which indicates the following, or at least thats what Sigma says:

Light  O  Green light  The lens is compatible.
 Blinking green light  The lens requires a firmware update with the USB Dock.
 Blinking orange light  The MC-11 requires an update to read new lens data.
 No Light  X  The lens is not compatible.


What else Sigma says about the MC11 Adapter:

  • Adapt Sigma Canon Mount or Sigma mount to Sony FE system
  • As new compatible lenses are released, control data from MC-11 is updateable via personal computer
  • Accessories Included: Front and Rear cap


 Sigma lenses that work with the MC11 adapter + Price

19 interchangeable Sigma lenses available for Sony E-mount camera bodies

Camera Converter Lens
Sensor Size Sigma Lens
a7 series
NEX series
a5000 series
MC-11 35mm (Full Size sensor) 24-35mm F2 DG HSM | Art
24-105mm F4 DG OS HSM | Art
120-300mm F2.8 DG OS HSM | Sports
150-600mm F5-6.3 DG OS HSM | Sports
150-600mm F5-6.3 DG OS HSM | Contemporary
20mm F1.4 DG HSM | Art
24mm F1.4 DG HSM | Art
35mm F1.4 DG HSM | Art
35mm F1.4 DG HSM | Art
50mm F1.4 DG HSM | Art
APS-C 17-70mm F2.8-4 DC Macro OS HSM | Contemporary
18-35mm F1.8 DC HSM | Art
18-200mm F3.5-6.3 DC MAcro OS HSM | Contemporary
18-300mm F3.5-6.3 DC MAcro OS HSM | Contemporary
50-100mm F1.8 DC HSM | Art
30mm F1.4 DC HSM | Art
Not required 19mm F2.8 DN HSM | Art
30mm F2.8 DN HSM | Art
60mm F2.8 DN HSM | Art
30mm F1.4 DC DN | Contemporary

Now if you look at that table which Sigma is providing that doesn´t look like a lot of lenses, BUT the very good news is allthough that Sigma is saying only Sigma lenses will work with this adapter, reality says something completely different. I have testet Canon lenses like my 70-200 F4 L and also Tamron lenses with Canon mount and they all worked with the MC11 🙂

Of course you don´t have any guarantee that your Canon or Tamron lens will work and how good it will work with this adapter, since Sigma is not officially supporting these lenses like Metabones does, but it´s definetly worth a try!

One thing you will have to keep in mind though that Eye-AF is really only possible with Sigma lenses on the MC11 Adapter. The only adapter that gives you Eye-AF with your Canon lenses is the Metabones Mark 4 Adapter with the latest update, but that adapter will cost you about 390$ in the US or 490 € in Europe.

The MC11 is not cheap either but you can get this adapter allready for 249$ in the US and 290€ in Europe.


Focusing with lenses on the MC11 adapter

First lens i have tested with this adapter is my Sigma 24mm 1.4.  When i got that lens i was using it only manual, because the A7II did not support Phase Detect AF, then Sony gave as the Firmware update for the A7II and i got the Viltrox adapter which finally enabled autofocus with this great lens. I was very happy using it with the Viltrox, but unfortunately the Viltrox includes some shiny parts inside the adapter which have no flocking, so when using it at about F4 i got very visible Lightleaks in the Corners. As i have written in the introduction the MC11 Adapter has complete flocking so you don´t have the annoying lightleaks and also the buildquality is much better than the Viltrox adapter.

Also the Viltrox Adapter does not give you Eye-AF, but i will not go into comparing these 2 adapters too much, that will be a seperate blogpost and video.

AF-S with the Sigma 24mm 1.4

The Single Auto Focus works good to very good with the MC11 and the Sigma 24mm 1.4 especially at F-Stops from F 1.4 – about F5, above that and especially at F8 the focus speed gets noticeable slower. But that is not an adapter problem, i have noticed the same with my Sony FE 50 1.8 which is allready slow, but quite painful slow at F8 because its only using the contrast AF. I was not able to switch the Sigma to use Phase Detect AF only with the MC11. Also the Sony Fe50 1.8 can not be switched to Phase Detect AF at the current firmware its running.

I also tested the AF-S in lowlight and it worked really good with the Sigma 24mm 1.4 shooting at F1.4, much better than i thought, even Face AF & Eye AF worked, see my results here on the Ufern Fest in Linz, very late in the evening, it was nearly getting dark:


Here is an image shot at F8, long exposure:

AF-S with the Canon 70-200 F4L

And now i come to the point which really, really surprised me. My adapted Canon 70-200 F4 L works great with this adapter and it works even faster than the Sigma 24 1.4 and also faster than the NATIVE Sony FE 50 1.8.

Of course this also because of the lens construction of the Canon, it has  a fast USM autofocus, but in my opinion because the Canon is using Phase Detect AF ONLY with the MC11 adapter helps a lot to get faster focus.

Not bad for a 17 years old lens, that according to Sigma should not work at all with the MC11! 🙂

Again the MC11 adapter has also a much better buildquality than  the Fotga Adapter which i was using with the Canon 70-200 F4L, the Performance is better with the MC11 and there is less hunting, especially when you shoot flowers, bees, small and thin objects.

This Canon has no IS but it gets stabilisation on the complete focal range thx to the IBIS in the Sony A7II.

Images shot with the Canon:

Eye AF & Face AF

On the Sigma 24 1.4 Eye AF and also the Face AF works great and it works on the entire screen, not just a small center part, so you really have all focusing modes available with the MC11 Adapter and it behaves and feels just like with a native FE lens. Sigma has done a great job unlocking that!

Here are some examples, i´ve shot with the Sigma 24mm 1.4 using Eye-AF:

With the Canon you don´t have Eye-AF but the Face AF works in the center part.


AF-C performance is something that Sigma has to improve quite a lot, the performance on the Sigma 24 1.4 is really bad in AF-C, for video its completely unusable if you have worked with a Samsung NX500 or NX1 like me,  than you know what fast video autofocus is.
Again the Canon 70-200 was better in that regard or at least useable.


You can see both lenstests in my Video Review linked above! Make shure to watch that.


More lenses i have tested

To test more lenses i went to a nearby store in Linz, called Saturn. The seller was so friendly to let me test the following lenses with the MC11 Adapter on my Sony A7II:

  • Sigma 50mm 1.4 ART
  • Sigma 150-600mm F5-6,3 Sport
  • Tamron SP 90mm 2.8
  • Tamron SP 85mm 1.8
  • Canon 70-200 F4L IS + Canon 2x Extender MarkIII

First of all the good news all of these lenses worked with the MC11 Adapter, but the results are VERY different and you have to keep in mind that the test results are done in a store where the light is really bad and i only had a very limited time with the lenses!

In short:

The Sigma 50mm 1.4 ART worked quite good, with the MC11 Adapter as you would expect also the Eye-AF, but i think my Sigma 24mm 1.4 works faster with the Adapter and the 24mm hasn´t got that so much what i would call “pumping or focus breathing” when focusing, so i would have expected the 50mm 1.4 to work a bit better to be honest, but it was definetly useable.


The Sigma 150-600mm Sport really surprised me in the store, it worked much better than i thought, now that is a very heavy lens, so handholding this beast is very difficult. The focus performance with the MC11 was very useable.



Now the new Tamron lenses. As i have allready written Tamron or Canon lenses should not work at all with this adapter, so there is no guarantee at all how good or if it works with the MC11.

The Tamron SP 90mm 2.8 worked on the first try, could focus instantly, but the  performance was more average in my opinion and the lens also showed like focus breathing with the MC11, but when it worked it was quite useable.

The Tamron SP 85mm 1.8 didn´t work at all on the first try and the camera needed longer to boot up, could only use it manual. Then i turned the camera off, pulled the battery out and waitet a few seconds. Battery back in and turned camera on, again it needed longer to boot but then i could use the autofocus. The performance again was more average, when it worked then it was quite usable.

So if you are planning to buy these 2 Tamron lenses the SP 85mm and the 90mm, i would rather not recommend the MC11 for that, these 2 lenses might work much better with the Metabones Mark 4. Keep in mind that this is only my experience with these 2 Tamron lenses, i have seen youtube videos where other Tamron lenses like the 24-70 2.8 or the 70-200 2.8 work very well with the MC11 Adapter.


The Canon 70-200 F4L IS surprised me a lot! Focusing worked really good even with a 2x Extender on the MC11. That Canon lens has IS which i turned on and that helped a lot with the Extender handholding such a focal length, it seemed to me the IBIS of the A7II didn´t work with the Extender, but i only had it for a short time. I really consider buying this extender for my Canon 70-200 F4L Non IS, even if i  could only use it with a monopod or tripod.

You can see all lenstests in my Video Review linked above! Make shure to watch that.


Image Quality

Some people in a  A7 Facebook group and on YouTube asked me if there is any image degradation with the MC11.

I´ve shot hundreds or nearly thousand of images with my 2 lenses the Sigma 24mm 1.4 and also with the Canon 70-200mm   F4L using all apertures, so i know and love the image quality. I´m really not seeing any degradation and can´t see why it should degrade the image quality. The Sigma MC11 adapter has no glass in it and as i have written above, you don´t get any lightleaks in the corners either thanks to the flocking inside.

Another question was about the bokeh with the Sigma 24mm 1.4 if the boekeh gets “nervous” or changes using the adapter. I´ve tested that and the bokeh does not change. The bokeh can only change when you turn on the Electronic first curtain shutter in the A7II using an aperture of 1.4 or 1.8 for example and a very fast shutterspeed like 1/6000 sec. That has nothing to do with the adapter, i´ve tested the same with the Sony FE 50 1.8 and noticed also a difference of the bokeh when the electronic first curtain shutter was turned on. The bokeh looks a lot smoother when you are not using the electronic first curtain shutter, if you want to test that you must be very near your subject. See my image examples:

Sigma 24mm 1.4

Electronic First Curtain Shutter ON:

Electronic First Curtain Shutter OFF:


Sony FE 50 1.8

Electronic First Curtain Shutter ON:

Electronic First Curtain Shutter OFF:

One more question was if the image gets completely corrected in camera when using jpeg only, a sony user was reading somewhere that this would happen with the MC11 adapter. I have tested that also and the jpeg out of camera does  not get fully corrected, things like distortion gets corrected if you select that in the A7II options but you can still see the vingnetting. So i would recommend shooting in raw and do all corrections in lightroom.

Image examples:

jpeg out of camera

raw with full correction in lightroom


So is this the one ring to rule them all? The answer is definetly no, but the sigma MC11 adapter really shines when using Sigma lenses, making it possible to use the Sigma 24mm 1.4, 150-600mm or the 50mm 1.4 and a lot of other Sigma lenses and have all features Sony mirrorless A7 cameras provide like Eye AF, Face AF, Lock-On AF and so on, like with native E-Mount lenses, but with different results. Sigma fullframe lenses are made for DSLR´s so don´t expect wonders.

The huge surprise is that allthough not officially supported by Sigma, also Canon and Tamron lenses with Canon mount work with this adapter. A lot of Canon lenses are working good to very good, but you should see this more as a very big bonus. Of course there are some Canon lenses and Tamron lenses that will not work  at all or rather bad.

My recommendation is if you are planning to buy the Sigma MC11 Adapter and Sigma lenses go in a store and test how good it works, the results can be very different, it really depends a lot on the lens you try it on.

So is the Sigma MC11 Adapter worth buying? For 249$ in the US and 290€ in Europe, you get a very solid adapter that is future-proof with its USB-Connection. The MC11 Adapter definetly makes a lot of sense if you have Sigma lenses and if you want to buy Sigma lenses +  your Canon or Tamron lens with Canon Mount could work too.

If you have a lot of Canon lenses than  the Metabones Mark 4 will still be your first choice, the Metabones supports the most Canon lenses and with the latest update you also get Eye-AF with Canon glass. This Eye AF feature on Canon glass has to be tested though how good the results really are and if it can compete with native E-Mount or the MC11. The Meatabones is not cheap with 390$ in the US or 490 € in Europe.



Personal use of the Author :

For my personal use this MC11 Adapter works just great with my 2 lenses the Sigma 24mm 1.4 and the Canon 70-200 F4L, better and more reliable than with the cheaper adapters like the Fotga and Viltrox, no lightleaks, better buildquality, less hunting. Now i only need the MC11 adapter for both lenses, so i will definetly keep it. After having tested the Commlite, Fotga and Viltrox i can say that with the Sigma MC11 it is my best experience with adapting lenses to my Sony A7II.


  • Excellent buildquality
  • Metal mounts
  • No noise when you put the lens on or off
  • Easy to mount the lens
  • Flocking material on the inside prevents lightleaks especially in the corners
  • USB connection for firmware updates
  • Full autofocus support like with native E-mount lenses incl. Eye-AF
  • Tracking AF works good to very good with Sigma lenses in the center while panning
  • Comes with a long USB Cable
  • Quite a lot Canon and Tamron lenses with Canon Mount work


  • Even with Sigma lenses the AF results are very different
  • Normal AFC especially in Video with Sigma lenses is really bad and needs to be improved
  • Full Sigma Lens support is quite limited at the moment
  • Some Canon lenses work faster than Sigma lenses in AF-S using phase detect and also better using AF-C
  • Sigma is not offically supporting Canon and Canon Mount lenses


*1=stay away from that garbage / 10=excellent


This is a non-profit website (Hobby)

If you want me to review your product and sponsor this blog and YouTube channel by providing your photography/videography related gear or software for free please contact me.