--- product_id: 127501732 title: "Sigma Mount Converter MC-21 (Canon EF to L Mount)" brand: "sigma" price: "FREE" currency: ARS in_stock: false reviews_count: 13 url: https://www.desertcart.com.ar/products/127501732-sigma-mount-converter-mc-21-canon-ef-to-l-mount store_origin: AR region: Argentina --- # Integrated LED compatibility Seamless EF to L-Mount conversion Lightweight 136g design Sigma Mount Converter MC-21 (Canon EF to L Mount) **Brand:** sigma **Price:** FREE **Availability:** ❌ Out of Stock ## Summary > πŸ”„ Unlock your EF lens legacy on L-Mount β€” adapt, save, and shoot smarter! ## Quick Answers - **What is this?** Sigma Mount Converter MC-21 (Canon EF to L Mount) by sigma - **How much does it cost?** FREE with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/127501732-sigma-mount-converter-mc-21-canon-ef-to-l-mount) ## Best For - sigma enthusiasts ## Why This Product - Trusted sigma brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Integrated LED Display:** Stay informed with built-in LED indicators for smooth operation. - β€’ **Lightweight & Balanced:** At just 136 grams, it keeps your rig gimbal-friendly and perfectly balanced. - β€’ **4-Year Warranty Confidence:** Backed by Sigma’s 4-year warranty for long-term peace of mind. - β€’ **Reliable One-Shot Autofocus:** Enjoy precise one-shot AF for photography, ideal for hybrid shooters. - β€’ **Maximize Your Lens Investment:** Use your extensive Canon EF glass on L-Mount bodies without breaking the bank. ## Overview The Sigma MC-21 Mount Converter effortlessly adapts Canon EF lenses to L-Mount camera bodies, enabling professionals to leverage their existing lens investments. Weighing only 136 grams, it offers a balanced setup ideal for gimbal use. While continuous autofocus is not supported, one-shot AF and manual focus remain fully functional. Integrated LED displays enhance usability, and a 4-year warranty ensures reliability. Perfect for millennial pros seeking cost-effective versatility without compromising quality. ## Description Mount Converter MC-21 Canon EF-L L-Mount Review: Great if you have a lot of EF Glass - 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. CONCLUSION For 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. Review: Works great! - I use this for my old EF lenses and my Lumix S5IIX. The autofocus works great with no problems. People say it works better than the native lenses. I honestly don't know, but it works great. I use it for my USM IS 50mm 1.4 L. I have no complaints; it's honestly the best converter you can get. ## Features - Mount Converter MC-21 Canon EF-L, Mount Converter MC-21 Canon EF-L, SIGMA - Accessoire image & son, Dimensions de lemballage de larticle ( L x L x H) en cm : 7 x 10.8 x 12.2 - QuantitΓ© de colis darticles : 1, Mount Converter MC-21 Canon EF-L, SIGMA - Accessoire image & son, Sigma - Accesorio de imagen y sonido., EF-Mount Lens to L-Mount Body,Integrated LED Displays Compatibility ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07Q8Q6QK9 | | Best Sellers Rank | #687 in Camera Lens Adapters & Converters | | Brand | Sigma | | Built-In Media | Camera Body | | Camera Lens | 7 | | Camera Lens Description | 7 | | Color | Black | | Compatible Camera Models | L-mount | | Compatible Camera Mount | Canon EF | | Compatible Mountings | Canon EF | | Customer Reviews | 4.3 out of 5 stars 178 Reviews | | Exposure Control Type | Automatic | | Focal Length Description | 24 millimeters | | Focus Type | Auto Focus | | Global Trade Identification Number | 00085126937232 | | Image stabilization | no image stabilization | | Item Type Name | Digital-slr-camera-lenses. | | Item Weight | 136 g | | Lens | Standard | | Lens Design | Prime | | Lens Fixed Focal Length | 24 millimeters | | Lens Mount | Canon EF | | Lens Type | Standard | | Manufacturer | Sigma | | Manufacturer Part Number | 89E969 | | Maximum Aperture | 1.4 millimeters | | Maximum Focal Length | 2 | | Media Type | Image, Video | | Minimum Aperture | 16 | | Minimum Focal Length | 2 | | Model Name | Sigma MC-21 Mount Converter - Canon EF to L-Mount | | Model Number | 89E969 | | Number of Items | 1 | | Number of Packs | 1 | | Real Angle Of View | 50 degrees | | Screen Size | 3 inches | | UPC | 085126937232 | | Unit Count | 1 Count | | Viewfinder Type | Electronic viewfinder | | Warranty Description | 4 years | | Water Resistance Level | Not Water Resistant | | Zoom Ratio | 1:1 | ## Product Details - **Brand:** Sigma - **Camera Lens Description:** 7 - **Compatible Mountings:** Canon EF - **Focal Length Description:** 24 millimeters - **Lens Type:** Standard ## Images ![Sigma Mount Converter MC-21 (Canon EF to L Mount) - Image 1](https://m.media-amazon.com/images/I/718jGL0ZKTL.jpg) ![Sigma Mount Converter MC-21 (Canon EF to L Mount) - Image 2](https://m.media-amazon.com/images/I/71OpgyTxfaS.jpg) ![Sigma Mount Converter MC-21 (Canon EF to L Mount) - Image 3](https://m.media-amazon.com/images/I/71Kj8izgEmS.jpg) ![Sigma Mount Converter MC-21 (Canon EF to L Mount) - Image 4](https://m.media-amazon.com/images/I/71BiJcVgVdS.jpg) ## Questions & Answers **Q: Does it work with EF-S lenses?** A: Yes it does Regards Steve 1-800-221-2253 cambridgeworld **Q: Does continuous autofocus still work with the adapter?** A: I could be doing something wrong however. Auto focus works using same setting when on my Panasonic 24-70 but when I attach adapter to the Ed lens it no longer works. On bhphoto they claim it does. **Q: why are the l mount things so expense? emount and rf adapters are so much cheaper?** A: The Sigma adapters are the highest Quality adapters made.They are made in Japan.Regards Steve 1-800-221-2253 cambrisgeworld **Q: Does this work with canon ef lenses or just sigma ef lenses?** A: It does work with the canon lenses also Regards Steve 1-800-221-2253 cambridgeworld ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great if you have a lot of EF Glass *by R***. on October 12, 2020* 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. CONCLUSION For 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. ### ⭐⭐⭐⭐⭐ Works great! *by J***E on July 12, 2024* I use this for my old EF lenses and my Lumix S5IIX. The autofocus works great with no problems. People say it works better than the native lenses. I honestly don't know, but it works great. I use it for my USM IS 50mm 1.4 L. I have no complaints; it's honestly the best converter you can get. ### ⭐⭐⭐⭐ Well it adapts lenses, but not much else. *by M***E on July 22, 2019* As others have noted this adapter leaves some things to be desired, in fact a number of things... Very basic things that you could really expect with a $250 adapter made by a world leader in lens technology with a number of break out hits under their belt. Things like auto focus, continuous auto focus, or maybe neither and a price about $100 cheaper? I'm personally using this adapter with a Panasonic S1 a Sigma 24-105mm F4, 24-70mm f2.8 and Canon 200mm F2.8 L. Strangely they all function differently when it comes to focus with the 200mm being the most accurate, the 24-105 being the least, and the 24-70 somewhere in between. Of all of them though I would say the same thing: the auto focus is very bad. In general it seems to latch on to a point just beyond what you're actually aiming at and if you rock back just slightly on your feet the point that was supposed to be in focus will come into focus. For a photographer this adapter would be an utter nightmare for single auto focus, especially with a fast subject like kids, animals, cars, birds, etc. You will not get the shot unless you're shooting something slow, controlled and willing to sit around and wait 20-30 seconds while you screw with focus. For video shooters this adapter does the job its supposed to do: allow you to clamp an EF lens on a L mount body and control aperture. Since a lot of videos shooters will likely be using manual focus, a focus puller, or maybe even setting focus and letting it stay put you might not find the quirks of the adapter as annoying. I tried out a Canon 50mm f1.4 and a 100 mm f2.0 and all the lenses were aperture controlled properly by the adapter. Still, as I said before none of the single auto focus performance was what I'd call trustworthy. Most people, myself included, can probably pull focus with by hand faster and more accurately than the damned S-AF mode. People have talked about firmware and USB ports and whatnot, but I'm imagining you could use a Sigma lens dock to update firmware the same way you do with their lenses so while I'm sure they COULD improve things I'm also not holding my breath they WILL. In all likelihood Viltrox or Metabones, Fotodiox or some other adapter company will cook up something $150-200 more expensive that works and has approximate C-AF and good S-AF... or someone will come up with a simple aperture control adapter for $150. Either one would be a great buy over this lukewarm middle of the road option that promises very little and still doesn't manage to deliver on any of it. So is this worth buying? Well since it's the only game in town as of mid 2019 and you're a cheap SOB looking to use their Canon lenses on a new body I'd say unfortunately yes it will be worth buying. If there was another option in town, or a mark 2 or something that could deliver on even a fraction of the AF potential of the L mount camera bodies then by god I'd recommend that hands down over this thing. If fast and sure auto focus is essential to you just buy the 24-105 F4 or some other cheap native L mount lens (an oxymoron I know). If you're just looking to use an EF lens on an L body to save some money and don't mind pulling focus entirely manually then go for it. It's the only choice anyhow. ## Frequently Bought Together - Sigma MC-21 FOR Canon - Glorich DMW-DCC17 AC Power Adapter Power Connector DC Coupler DMW-BLK22 Dummy Battery Power Kit Compatible with Digital Cameras Panasonic LUMIX S5 DC-S5 DC-S5K DC-S5GK GH5 II GH6 Battery Grip DMW-BGS5 - SD UHS-II 256GB Card V60 –Up to 130MB/s Write Speed and 250 MB/s Read Speed | For Professional Vloggers, Filmmakers, Photographers & Content Curators – By Prograde Digital --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.com.ar/products/127501732-sigma-mount-converter-mc-21-canon-ef-to-l-mount](https://www.desertcart.com.ar/products/127501732-sigma-mount-converter-mc-21-canon-ef-to-l-mount) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-08-25*