Sigma Mc-11 Lens Compatibility

[Jomega Gibson]

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Flexibility. Quality. Range. The current flow of photographic technology is turning, though arguably, toward the incredible imaging power packed into mirrorless camera systems. These smaller and lighter camera bodies pack dSLR resolution and ISO performance into housings that are shockingly compact.

Still, many shooters are seemingly reluctant to switch from their tried and true camera systems with justifiable apprehension. The reason? They feel as if they would be starting from scratch; needing to purchase completely new lenses to match their new mirrorless camera systems.

This is not the case. While the technology has been floating around for some time, converters/adapters have now began maturing to the point where virtually any lens system, even those with advanced autofocus and profiles, can be used to full effect with power-punching mirrorless camera set ups. But not all adapters are created equal.

The indicator markings are well done and highly visible. The converter is finished in a heavy duty matte black coating. The forward release switch is aggressively grooved for easy operation. The USB port (more on this later) is weather sealed to keep out all the nasty bits of dirt and moisture that can be encountered in the field.

The converter feels quite solid and mounts very cleanly to the A7R MK1 test camera used for the review. The lens provided by Sigma for testing with the converter is the 24mm f/1.4 DG HSM Art which the adapter also mated to tightly. Aesthetically, the lens and converter matched fantastically.

A nifty little feature of the MC-11 is the LED indicator light for lens compatibility. There is a small LED light close to the base of the adapter that lets you see if the lens you have attached is compatible with the MC-11 adapters current firmware.

In my test, I mounted a Canon 50mm f/1.4. The lens attached perfectly and communication with the camera seemed to be fine. Using my Sony A7R in full-frame mode, the AF was somewhat lacking. Often the camera would not focus at all. When it did, timing was extremely slow at around three to four seconds until lock. Oddly enough, when I switched the camera to APS-C mode the AF came to life and focused accurately in under one second.

Keep in mind that the LED indicator light did not illuminate when I attached the Canon lens meaning it is completely non-compatible with the firmware of the converter. With that being said, using a Canon lens with the MC-11 is not outside the realm of experimentation. Just proceed with caution.

Functionally, the converter performs as advertised and depending on your expectations perhaps even better. The AF speed with my Sigma test lens were great and that was the selling point for this author. This is certainly a converter that I would use daily without hesitation.

Adam is an author, adventurer, photographer and a jolly co-founder of Contrastly. You can usually find him on some distant trail making photographs, in his darkroom or at his computer writing and planning his next project. Follow his work over at hiswebsite , Facebook, Instagram and YouTube .

The new MOUNT CONVERTER MC-11 allows you to use your SIGMA SA mount and SIGMA EOS mount interchangeable lenses with the Sony E-mount camera body.

Until now, the market has seen the introduction of many methods for using lenses from one camera system with a body from a different system. In the digital age, however, camera systems have become much more complex, and it is challenging to create a mount converter that aligns both the mechanics and software of the lens and body. Creating a converter that matches lenses for current DSLRs to bodies for mirrorless interchangeable-lens camera systems is even more challenging. Now the market demands a converter that goes beyond simply aligning the flange back distance to retaining full functionality.

MOUNT CONVERTER MC-11 incorporates the digital data necessary to provide fast and smooth AF for compatible lenses as well as OS features and functions of the camera that help control peripheral brightness and correct transverse chromatic aberration, distortion, and more.

In addition, since Sony E-mount camera bodies do not require mechanical integration with lenses for aperture control, the MOUNT CONVERTER MC-11 makes SIGMA SA mount interchangeable lenses and SIGMA interchangeable lenses for Canon cameras fully compatible with the automatic exposure control of Sony E-mount camera bodies.

MOUNT CONVERTER MC-11 is ideal for professional photographers who use different camera systems depending on the subject, as well as amateur photographers who enjoy using a variety of camera systems. Increasing the compatibility of lenses with different camera systems makes these assets more valuable than ever. In addition, users of Sony E-mount camera bodies will enjoy an immediate increase in the number of lenses available to them.

With the MOUNT CONVERTER MC-11, users of SIGMA SA mount interchangeable lenses and SIGMA EOS mount interchangeable lenses for Canon camera bodies* can use them with Sony E-mount camera systems. Users of multiple mounts will enjoy more flexible use of their valuable lens assets.

The LED display on the MOUNT CONVERTER MC-11 makes it easy to know whether an attached lens is compatible or not and whether the mount converter control data needs to be updated for operation with that lens.

The compatibility of MOUNT CONVERTER MC-11 with the OS features of both the lens and the camera body makes possible superior correction of camera shake and other stability issues. When used with a camera body that features an OS function, MOUNT CONVERTER MC-11 allows angle shake correction in the lens for superior corrective performance.

It seems that at this time, Sigma claims only compatibility for Sigma EF lenses. But I wish Canon lenses would be compatible as well, with better AF performance than the Novoflex one, and stabilization kept, especially for the long focals (like the last 100-400, eventually with 1.4x).

Well, considering that to use MC21 is to adapt other manufacturer glass onto the L mount, maybe adapting to an old sensor tech of the SL might not be optimal. The MC21 is design for the future. We can hope for SL2 to be able to use that MC21.

As far as AF is concerned, it works but without tracking. This means AF-C does not work. The lens will focus but AF will not track as you move the camera/lens. The S1/R will even prompt you to switch to AF-S. I felt the focusing is slower (when set to S mode) than the Sony A7r3 using the same lens with MC-11.

The above observation is limited to the Canon 400mm f4 DO II lens. I am not sure if AF will perform better with other EF lenses. I suspect firmware upgrades in the future will improve overall AF performance.

Afraid I did not test the frame rate. I would assume it should not be affected. I was more interested in the speed of the AF since the Novoflex adapter on the S1/R could not even perform AF with EF lenses.

Some bad news. I tested the MC-21 with the Canon MP-E 65mm Macro and it did not work at all. The aperture seems to be stuck at f99 ? With the Canon 100mm Macro L IS, it seemed to work - AF and aperture control - but it underexposes by at least 1 stop when using flash in manual mode. Switching over to the Novoflex adapter, both lenses worked fine, even with flash. I think the firmware needs updating on the Sigma MC-21.

The MC-11 Mount Converter enables the use of Sigma EF-mount lenses on Sony E-mount mirrorless camera bodies, and maintains full lens performance, including autofocus and auto-exposure, as well as in-camera correction technologies. An integrated LED can be used to display select Sigma lens compatibility with the adapted camera body, and the adapter also supports in-camera image stabilization. In order to maintain a high degree of image quality, the interior of the adapter is flocked to reduce reflections, and it also retains full EXIF data to benefit post-production and file management.

Excluding the LA-EA3 that Sony designed for its DSLT lenses, all the other adapters are made by third-party manufacturers that mainly produce accessories. One of the most popular (and most expensive) is the Metabones Smart Adapter mark IV but you can also find products from Fotodiox and Viltrox.

Then along came Sigma, a brand known for its high quality (and in some cases, unique) prime and zoom lenses. The MC-11 announcement surprised me at first since I was expecting to see some native full-frame E-mount lenses from the brand at some point. Instead, the Japanese company decided to release its own adapter designed exclusively for E-mount cameras.

Thinking about it, this solution was the fastest and cheapest that Sigma could have possibly come up with. The company already has an extensive range of DSLR products which get excellent reviews and are affordable. Why risk investing in a brand new lens series when a simple adapter could do the trick?

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