--- product_id: 604712767 title: "Meike EFTR-0.71X Lens Mount Adapter Speed Booster 0.71x Focal Reduction Lens Mount Converter Speedbooster for Canon EF Mount Lenses to Canon APS-C Cameras EOS R10" brand: "meke" price: "€ 354.86" currency: EUR in_stock: true reviews_count: 5 category: "Meke" url: https://www.desertcart.pt/products/604712767-meike-eftr-0-71x-lens-mount-adapter-speed-booster-0 store_origin: PT region: Portugal --- # 1 f-stop increase 0.71x focal reduction Durable metal build Meike EFTR-0.71X Lens Mount Adapter Speed Booster 0.71x Focal Reduction Lens Mount Converter Speedbooster for Canon EF Mount Lenses to Canon APS-C Cameras EOS R10 **Brand:** meke **Price:** € 354.86 **Availability:** ✅ In Stock ## Summary > 📸 Capture Brilliance with Every Click! ## Quick Answers - **What is this?** Meike EFTR-0.71X Lens Mount Adapter Speed Booster 0.71x Focal Reduction Lens Mount Converter Speedbooster for Canon EF Mount Lenses to Canon APS-C Cameras EOS R10 by meke - **How much does it cost?** € 354.86 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/604712767-meike-eftr-0-71x-lens-mount-adapter-speed-booster-0) ## Best For - meke enthusiasts ## Why This Product - Trusted meke brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Transform Your Shots:** Elevate your photography with a 0.71x focal reduction for stunning bokeh. - • **Precision Engineering:** Crafted from robust metal for durability and resistance to the elements. - • **Seamless Compatibility:** Supports auto focus and vibration compensation for effortless shooting. - • **Adjustable Gasket System:** Fine-tune focus distance with an easy gasket adjustment for perfect clarity. - • **Light Up Your Creativity:** Boost your lens' light intake by 1 f-stop for brighter, more vibrant images. ## Overview The Meike EFTR-0.71X Lens Mount Adapter Speed Booster is designed for Canon EF lenses to APS-C cameras like the EOS R10. It enhances light intake by 1 f-stop, reduces focal length by 0.71x, and features a durable metal construction for outdoor shooting. With support for auto focus and vibration compensation, this adapter is perfect for photographers seeking to elevate their craft. ## Description Lens Mount Adapter Speed Booster 0.71x Focal Reduction Lens Mount Converter Speedbooster Review: Resolve o problema do sensor crop. - Pra quem precisa de um campo de visão maior, ela atende bem. Na fotografia não há o que reclamar. Apesar do erro que sempre vai aparecer ao ligar a camera, ela funciona bem. O problema vem quando você precisa usar o estabilizador IBS ( direto do sensor ), na minha R7 usando uma 24-70mm f2.8, abaixo de 35mm o estabilizador fica perdido sem conseguir estabilizar. Review: Good product but read the review carefully to know what to expect. - I was originally going to buy the metabones adapter but this was flagged to me so i thought id try it on y Canon R7. Positives. The RF side locks in really well to the body. The weather seal on the RF side fits nicely. The control wheel on the side works well and can be allocated a custom function. The image quality with the speed booster on is largely unaffected , if pixel peaking one can see some very slight image fuziness in the corners of some images but then again its showing more of the actual lens image footprint on the sensor that one wouldnt usually see on an APS-C crop sensor so the tiny amount of softness could be the lens itself you just never see it on a crop sensor.. Works pretty well on most lenses but see the not so good comments below Great price compared to metabones Allows an extra stop of light Not so good When using some zoom lenses that arent equipped with IS the built in IBIS of the camera jumps at certain zoomed focal lengths when zooming through. . In my case this happens to my Canon EF 2.8 24-70 L when zooming passed 20-21mm ( as reported in camera by the speedbooster not on the actual lens focal length ) and my Canon 2.8 70-200M L zooming passed 69mm( again, as reported in camera by the speedbooster not on the actual lens focal length ) . The IBIS stutters at that point as i dont think the camera can work out whats going on as the reported focal length isnt the true focal length of the lens and at that point in the zoomed focal length compared to the true focal length a brain fart and the IBIS over reacts . The way around this is to set IBIS from always on to 'one shot ' so IBIS only cuts in just before taking a photo and not when zooming the lens .Although in video mode you cant do this as IBIS runs all the time so you need to avoid shooting video and zooming while filming when using the lenses which is a pain. Edit, I’ve found the stutter was due to ibis turning on , when the lens is wider than the actual focal length the camera turns Ibis off as the adaptor isnt providing the body with the correct focal length information. I have reported this to Mieke but they didn’t seem overly bothered to investigate and have never updated the firmware so I don’t use the adaptor anymore as of 2026 and it sits in a drawer . The finish on the adapter is glossy meaning it catches the light which isnt great if using for nature, i wish it was satin. The EF side of the mount whilst secure still suffers from the EF mount wriggle albeit very slight and no worse than Canons own system. The EF side hasnt been designed for the EF weather resistant gasket in mind so the lens gasket rides over the edges of the face of the adaper and provides no sealing what so ever, odd as the RF side is designed nicely and seals well against the body on that side of the adaptor. The warning that the accessory isnt designed for the camera every time you turn the camera on which you have to accept to use the adapter , to be fair you have to do this with the Canon speedbooster offering so its more of a camera thing that the speedbooster itself The instructions are poor, they provide gaskets to adjust infinity focus but the 'how to' is brief and doesnt really give enough info to attempt it yourself. Basically i wouldnt even mess with that unless you use manual focus and need to use the lens window to work out the focus distance. I contacted their tech support to ask if there was a fix for the IBIS issue , they just responded with 'try this please' and sent a basic firmware file but no instructions regarding how to install or installer file it so im no better off . So id say its a good product that could be better supported and could do with some very small design tweaks and possibly a frimware update for the IBIS issue when zooming non IS lenses . Id say its 90% there with regards to me being totally happy with it. Its very usuable as is however and the image quality is great, autofocus works great, the near full frame image is great... there are a lot of greats and not so many not so greats here. ## Features - Use this adapter when mount a EF series lens with Canon RF S35 movie camera or APS-C camera such as EOS R10 - Speedbooster lens mount adapter, can increase the lens 1 f-stop, increasing the amount of light into the virtual background, can better highlight the theme, features electronic contacts, support EF series lens auto focus and vibration compensation. - Mount adapter speed booster, allows the aperture to be increased by one stop while the focal length is reduced (Equivalent Focal Length = Focal Length x 0.71 x 1.6), increasing the lens' 1 f-stop, resulting in better bokeh in photos. - Gasket increase or decrease, after use, if the focus distance does not match after it is used with the lens, you can increase or decrease the gasket adjustment, the gasket needs to be placed flat, otherwise it will affect the picture quality. - The lens mount and camera mount of this adapter is made of metal, makes the item durable, waterdrop resistance and dust resistance, is easy carry when you outdoor shoot, product weight only 166g. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CJR6KFL3 | | Best Sellers Rank | #916 in Camera Lens Adapters & Converters | | Customer Reviews | 4.1 4.1 out of 5 stars (17) | | Date First Available | September 25, 2023 | | Item Weight | 10.2 ounces | | Item model number | MK-EFTR-0.71 | | Manufacturer | HK Meike | | Product Dimensions | 3.94 x 3.94 x 3.94 inches | ## Images ![Meike EFTR-0.71X Lens Mount Adapter Speed Booster 0.71x Focal Reduction Lens Mount Converter Speedbooster for Canon EF Mount Lenses to Canon APS-C Cameras EOS R10 - Image 1](https://m.media-amazon.com/images/I/61yxGTjkc3L.jpg) ## Customer Reviews ### ⭐⭐⭐ Resolve o problema do sensor crop. *by G***I on 1 September 2024* Pra quem precisa de um campo de visão maior, ela atende bem. Na fotografia não há o que reclamar. Apesar do erro que sempre vai aparecer ao ligar a camera, ela funciona bem. O problema vem quando você precisa usar o estabilizador IBS ( direto do sensor ), na minha R7 usando uma 24-70mm f2.8, abaixo de 35mm o estabilizador fica perdido sem conseguir estabilizar. ### ⭐⭐⭐ Good product but read the review carefully to know what to expect. *by T***K on 18 July 2025* I was originally going to buy the metabones adapter but this was flagged to me so i thought id try it on y Canon R7. Positives. The RF side locks in really well to the body. The weather seal on the RF side fits nicely. The control wheel on the side works well and can be allocated a custom function. The image quality with the speed booster on is largely unaffected , if pixel peaking one can see some very slight image fuziness in the corners of some images but then again its showing more of the actual lens image footprint on the sensor that one wouldnt usually see on an APS-C crop sensor so the tiny amount of softness could be the lens itself you just never see it on a crop sensor.. Works pretty well on most lenses but see the not so good comments below Great price compared to metabones Allows an extra stop of light Not so good When using some zoom lenses that arent equipped with IS the built in IBIS of the camera jumps at certain zoomed focal lengths when zooming through. . In my case this happens to my Canon EF 2.8 24-70 L when zooming passed 20-21mm ( as reported in camera by the speedbooster not on the actual lens focal length ) and my Canon 2.8 70-200M L zooming passed 69mm( again, as reported in camera by the speedbooster not on the actual lens focal length ) . The IBIS stutters at that point as i dont think the camera can work out whats going on as the reported focal length isnt the true focal length of the lens and at that point in the zoomed focal length compared to the true focal length a brain fart and the IBIS over reacts . The way around this is to set IBIS from always on to 'one shot ' so IBIS only cuts in just before taking a photo and not when zooming the lens .Although in video mode you cant do this as IBIS runs all the time so you need to avoid shooting video and zooming while filming when using the lenses which is a pain. Edit, I’ve found the stutter was due to ibis turning on , when the lens is wider than the actual focal length the camera turns Ibis off as the adaptor isnt providing the body with the correct focal length information. I have reported this to Mieke but they didn’t seem overly bothered to investigate and have never updated the firmware so I don’t use the adaptor anymore as of 2026 and it sits in a drawer . The finish on the adapter is glossy meaning it catches the light which isnt great if using for nature, i wish it was satin. The EF side of the mount whilst secure still suffers from the EF mount wriggle albeit very slight and no worse than Canons own system. The EF side hasnt been designed for the EF weather resistant gasket in mind so the lens gasket rides over the edges of the face of the adaper and provides no sealing what so ever, odd as the RF side is designed nicely and seals well against the body on that side of the adaptor. The warning that the accessory isnt designed for the camera every time you turn the camera on which you have to accept to use the adapter , to be fair you have to do this with the Canon speedbooster offering so its more of a camera thing that the speedbooster itself The instructions are poor, they provide gaskets to adjust infinity focus but the 'how to' is brief and doesnt really give enough info to attempt it yourself. Basically i wouldnt even mess with that unless you use manual focus and need to use the lens window to work out the focus distance. I contacted their tech support to ask if there was a fix for the IBIS issue , they just responded with 'try this please' and sent a basic firmware file but no instructions regarding how to install or installer file it so im no better off . So id say its a good product that could be better supported and could do with some very small design tweaks and possibly a frimware update for the IBIS issue when zooming non IS lenses . Id say its 90% there with regards to me being totally happy with it. Its very usuable as is however and the image quality is great, autofocus works great, the near full frame image is great... there are a lot of greats and not so many not so greats here. ### ⭐⭐⭐⭐⭐ Very nice speedring *by L***E on 1 June 2026* Works very well. Gets most of your crop factor back and adds a stop to your lenses. Only issue is camera complains about it not being a standard accessory, but just requires an extra button push when turning the camera on. Used it to get some great astro photography shots. ## Frequently Bought Together - Meike EFTR-0.71X Lens Mount Adapter Speed Booster 0.71x Focal Reduction Lens Mount Converter Speedbooster for Canon EF Mount Lenses to Canon APS-C Cameras EOS R7 R10 - Canon EOS R7 Mirrorless Camera (Body Only), Hybrid Camera, 32.5 Megapixel (APS-C) CMOS Sensor, 4K Video, for Sports, Action, Content Creators, Vlogging Camera, Black - SmallRig R7 Cage for Canon R7, Aluminum Alloy R7 cage with Quick Release Plate for Arca Stand, Cold Shoe, NATO Rail and Threaded Holes, Formfitting Camera Cage Video Rig for Canon R7-4003 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/604712767-meike-eftr-0-71x-lens-mount-adapter-speed-booster-0](https://www.desertcart.pt/products/604712767-meike-eftr-0-71x-lens-mount-adapter-speed-booster-0) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-09-30*