I’m going to get straight to the point and over a few topics about the MC-11 adapter that you want to know about.
YouTube user, eirim posted a link to an article on Sigma’s website detailing current and future firmware updates for their newer line of lenses. On the list is the Sigma 120-300 Sport, which is touted to get a firmware update between June to August.
Unfortunately, the Sigma 35 Art for Canon did not get an update to improve MC-11 performance. However, the Sigma mounted version did get an update.
The firmware update process isn’t difficult at all. You’ll need to visit a website that I have posted below. Unfortunately, you will need to buy the Sigma USB Dock in order to do the update. But once you install the software, plug in the USB and connect your lens, the program will automatically detect any updated firmware.
I need to redact what I said earlier. This adapter is really only good with Sigma’s newer line of lenses. Any old Sigma lenses or even non-sigma lenses will have compatibility issues. Unless Sigma releases a firmware for it, we’re out of luck.
The Issue Itself
What happens is depending on the lens, if you take a photo in AF-C and sometimes in AF-S, the camera will freeze and hang. You’ll notice some weird behavior. The camera will either continue to work or just shut down.
Sigma 120-300 (S) Performance
Now let’s talk about the performance of the Sigma 120-300 Sport. I had the chance to go ahead and shoot some softball and baseball. I primarily tested the camera out during baseball.
Autofocus in VIDEO
The opening of this video, showed you some slow motion samples of the Sigma 120-300 tracking the subject in AF-C. So if you were wondering if it could track a subject with the adaptor, it absolutely can. I had my camera set to AF-C, Wide, 120fps. You will hear a stepping noise with the lens, so keep that in mind when you’re shooting with it.
Autofocus in Photos
Surprisingly, the autofocus performance with the adaptor did really well compared to track and field. Although the subjects in baseball move very fast at times, the lens kept up for most of it. I wouldn’t say it’s native-like performance, but it was adequate enough to get the job done, and you can see it in the examples that I’m showing. By the way, I had to shoot awkwardly for some of these photos because I was recording with the Atomos, so please excuse the shaking.
I tried a variety of settings. YouTuber, Nikolaj F. Halberg recommended I try using a slower burst rate. I actually found it to work more accurately, as you didn’t experience that hang issue where the photo would lock on the first or second frame and then lose focus. It’s just a shame it can’t work absolutely well at the fastest burst rate.
As much as I like Sigma, I’m a bit unhappy. The real issue is that Sigma brought out a product that wasn’t ready for prime time. I know they will be releasing firmware updates, but it’s going to negatively impact the product because of it. I’m still confused why they didn’t get a proper firmware update for their Sigma 35 Art in the Canon Mount. It’s a very well regarded lens for its performance and sharpness. But overall, this adaptor will provide a lot of users great performance with their Sigma lenses. They’ll just have to wait a little longer.