Sigma MC-21 FOR Canon

Does exactly what it says on the tin. Very well built and sturdy even when using with a heavier lens like the 70-200 f2.8.

The Sigma MC21 EF - L Lens converter works perfectly with my Panasonic S5ii camera. It has allowed me to adapt my Canon lens to the Panasonic body and get single shot autofocus; aperture control - and benefit from the camera bodies excellent stabilisation. There is an indicator LED on the adaptor that lights up to tell you things are well; the one time it didn't go green power cycling the camera resolved it.The adaptor has a tripod thread; which works nicely with smaller lenses - like a 50mm f1.2 L - but with longer lenses it still feels better to use the lens' own shoe. If you haven't used some of the canon RF bodies the adaptor may change your workflow; as swapping lenses does require you to power the camera off and on again as you change. This soon becomes second nature; and the led not going green is a hint you made a mistake.It allows me to shoot with all my EF lenses on the S5ii giving me a lot of opportunity without spending thousands on a new set of lenses. I you shoot sports or moving video you will miss servo autofocus but that seems to be the only downside.

This works really well. I’ve used it to adapt an older sigma 600mm long lens. The AF is fast and all functions work really well. Build quality is excellent and zero degradation of picture quality. A great item but at £200 very expensive!

I bought this for use with the BMCC6K. The BMCC6K does not have continuous autofocus so o can’t comment on how that might work but it works well with the one shot autofocus of the camera. All other functions like aputure control and stabilisation work fine. The only thing that I’m not happy about is the price. It just seems a little steep for what it is. Also there is no USB port for firmware updates.

Autofocus functions, ibis functions (or lens stabe if equipped, but don’t work together). AF on older EF lenses is a little slow compared to native glass, but very usable.Note, in order to get any kind of stabilization to work, you need to switch the stabilization switch on the lens to ON, but change the setting in the camera to either lens or body. Neither will work if the lens stabilization switch is off.

Body and build is OK, but AF is not working as expected.Need to work with MFTried with 70-200 f2.8 on Lumix s5Totally dissatisfied for that price

Funcionando a la perfección en AFC con una Panasonic S5ii y objetivos EF

Bei Videoaifnahmem mit 17-40 mm, AF nicht nötig. Manuelle Fokus ist sicherer, Focus breathing oder das AF pumpen gelöst

OVERVIEW I recently got the Panasonic S5 but the L mount lenses are very expensive, large, and overall impractical to me. I have a lot of EF mount glass for my 5DIV and C200 so I went looking for a way to minimize having to buy new lenses and to use my existing EF glass. This adapter turned out to be the perfect solution.THE GOOD- Quality - The adapter seems high quality, the base plate mount is a nice touch and helped me move the tripod adapter plate forward which makes balancing it on a gimbal easier.- AF - Of course everyone is complaining about AF. You do lose continuous AF with this adapter when using EF lenses even if you use a Sigma lens. But one shot AF still works perfectly fine. I mainly got the S5 for video and I use MF when shooting video so I really don't care about the AF. For photography one shot is fine with me for those times I need photography as well. If you really need continuous AF then this is not the adaptor for you.- Cost Savings - If you already have an investment in EF glass, this adapter could save you thousands, it also keeps you from buying lenses in a system that seems very limited. Only members of the L mount alliance use L mount lenses which are very expensive with limited selection; vs. EF which has the largest lens ecosystem available.THE BAD- Manual Focus - When manually focusing, not all lenses seem to report to the Panasonic body that the MF wheel has been turned; this means that if you have it set to auto zoom when manually focusing it does not work. The 24mm F2.8 Canon EF lens works perfectly, whereas the 24-105mm F4 Canon EF lens does not work. The Sigma 50mm F1.8 also works properly. Fortunately on the S5 you can just press the magnification button so it is not that big of a deal.- Continuous AF - As I previously mentioned, if your work requires continuous AF, then you will need to get native glass, Continuous AF does not work with this adapter.CONCLUSIONFor my specific uses, this adapter is perfect, this adapter keeps me from having to buy any L mount lenses and lets me use my significant investment in EF glass. If I ever need continuous AF I will use my 5DIV, the 20-60mm kit lens, or I will finally buy an L mount lens. But at least for the moment, I don't foresee ever needing it. Thanks to this adapter my new gimbal setup is the Canon EF 24mm F2.8, the Panasonic S5, and this adapter. It balances perfectly on the Ronin S and is actually lighter than my GH5 setup.