Sigma MC-11 Mount Converter/Lens Adapter (Sigma//Canon EF-Mount Lenses to Sony E) with 32GB Ultra SDHC UHS-I Memory Card and Accessory Bundle

Works well built good packing is nice. Deff needed this for some other lens to use on my Sony A7iii. I can use sigma lens now on this. Little heavy but it’s worth it.

I’m a well-known pro and specialize in tech and imaging reviews. If you are reading this review you already know the Sony mirrorless cameras are terrific. Like me, you are likely looking for ways to use your excellent Canon glass with the Sony system. Simply stated, the Sigma MC-11 is a terrific solution. But be aware that it’s not a miracle maker: PROS: No loss in optical quality. Great build and ease of use. A fair price. Most Canon EF and other lenses will work with quite good focusing speed and tracking. CONS: Some lenses are outliers so be sure you have latest firmware installed. You may like Sony lenses for typical lighter weight. The MC-11 adds 4.4 ounces to lens weight. OBSERVATIONS AND TESTING: I did an exhaustive test with my high end Canon lenses, using them with the 61 megapixel Sony A7R IV. A camera with this type of truly incredible resolution will really show differences although in most uses, minor differences in lens sharpness are not as discernable as what I’ll discuss here: My Canon lenses are great. The Sony lenses, in almost every case, are better yet. Thus, if you are using a camera with crazy high resolution like the A7R IV, you may want to switch to Sony lenses sooner rather than later. Depending on the Canon lens tested, focusing is really good, but fast tracking for sports and wildlife is a bit behind native Sony lenses. The best Sigmas and Tamrons optimized for Sony will also sometimes beat Canon lenses for speed and tracking. I tested Canon EF lenses including 16-35 f2.8, 16-35 f4, 24-70 f4, 70-200 f2.8, 70-200f4, 24 IS, 300 f4 IS, 1.4x TC. They all did a great job. Particularly, I’m seriously considering hanging onto my wonderful 70-200mm and 300mm Canon’s for use with the MC-11. Sony does not yet have quite the perfect match for me in those focal lengths that match light weight with pro performance. The only lens disappointment for me was the otherwise wonderful Canon 100 f2.8 Macro. It hunts for focus and was not a good performer with the MC-11. CONCLUSION: The price is right compared to the competition from Metabones that I have not yet tested. However, I don’t feel I need to. The Sigma MC-11 looks great in combination with Canon lenses and Sony bodies, has a build quality to match, and is the ideal bridge to meet the advantages of Sony system over my old amigo Canon. Hope this long review has been of some small help. HAPPY SHOOTING!

I am currently using this on a Sony a7ii. I was a little worried buying this adapter since it only supports Sigma lenses. I have not had any issues getting this to work with any non-Sigma lenses. I have used it with Canon, Tamron, and Tokina branded lenses with no issues. Auto focus works fine but is somewhat slower. Also depending on the lens when using manual focus the camera does not zoom in to assist with focus. I do keep the firmware updated whenever they release a new one and its not that hard to do. If you are not willing to pay double the price for the Metabones adapter you should definitely get the MC-11.

Nice adapter it works!

***Testing done with A6300*** This adapter is better value than the cheapo adapters but has it's limitations vs the Metabones. AF is good but inconsistant. Gets it right about 80% of the time. Works better with Sigma's own lenses. If video is your focus, this is the best option but still only works with Sigma's own lenses, eye AF works but only with Sigma's own lenses (although I heard that canon lenses work for video and eye AF on the newest of Sony's cameras but I can't vouch for that).

After many loyal years with Canon Cameras, I finally jumped ship to the Sony A7Riii. The MC-11 is a must have to continue using full frame Canon and Sigma lens. Just remember to update the firmware via USB cable, no dock required. Not every lens is a perfect match. Some are better than others. Example, the Canon 24-105L comes really close to native Sony Glass. Sony glass is pricy therefore the MC-11 is an awesome transition or permanent tool depending on your approach: mixed brands or Sell Canon lens and switch to all native Sony mount lens. Connection was easy. Solid Sigma quality. Fast delivery.

This was the best bargain on Amazon. Everything in this kit is top quality and the adapter works like a dream.

Well made and functions as advertised, in general. One of the reasons I bought it, perhaps the main reason, was to use my Canon EF-S 55-250 lens on my Sony alpha 6000 body; however, the adapter/converter will not accept the Canon EF-S lens. This was not made clear in the description on Amazon. I'm keeping it because my Sigma 18-300 Canon-mount lens fits it and works well with the alpha 6000 body, although that lens is mainly used with another camera. The auto focus works OK and there is no apparent vignetting.

Impresionado con la calidad de lo que incluye el paquete o combo. El adaptador es real, llegó rápido. Todos mis lentes Canon enfocan sin problema para imágenes, aunque todavía no logro hacerlo con el video en una Sony a7 IV. Hay quienes dicen que sí se puede y otros dicen que no. También quise actualizar el firmware del adaptador pero ya estaba en la última versión.