--- product_id: 592092482 title: "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" brand: "meike" price: "₨166274" currency: LKR in_stock: true reviews_count: 12 url: https://www.desertcart.lk/products/592092482-eftr-0-71x-lens-mount-adapter-speed-booster-0-71x store_origin: LK region: Sri Lanka --- # 1-stop aperture boost 0.71x focal length reduction metal mount, dust & water resistant 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 **Brand:** meike **Price:** ₨166274 **Availability:** ✅ In Stock ## Summary > 📸 Unlock pro-level clarity & speed—because your lens deserves the ultimate upgrade! ## Quick Answers - **What is this?** 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 by meike - **How much does it cost?** ₨166274 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/592092482-eftr-0-71x-lens-mount-adapter-speed-booster-0-71x) ## Best For - meike enthusiasts ## Why This Product - Trusted meike brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Widen Your Perspective:** 0.71x focal length reduction expands your field of view—capture more without changing lenses. - • **Amplify Your Light Intake:** Boost your lens aperture by 1 f-stop for brighter, sharper shots even in low light. - • **Precision Focus Adjustment:** Customizable gasket ensures perfect focus alignment—no compromises on image quality. - • **Rugged & Ready for Adventure:** Durable metal construction with dust and water resistance keeps you shooting anywhere, anytime. - • **Seamless Autofocus & Stabilization:** Full electronic contacts support EF lens autofocus and image stabilization for flawless performance. ## Overview The Meike EFTR-0.71X Speed Booster adapter transforms Canon EF lenses for Canon APS-C and RF mount cameras like EOS R7 and R10 by reducing focal length to 0.71x and increasing aperture by 1 stop. Featuring full electronic contact support for autofocus and image stabilization, a durable metal mount with dust and water resistance, and adjustable gasket for precise focus, it delivers wider, brighter images with enhanced bokeh and low-light performance—all in a lightweight 166g design. ## Description Meike EFTR-0.71X Lens Mount Adapter Speed Booster Canon EF series lenses Canon RF mount series such as Canon RF S35 movie camera or amera EOS R7 R10. Connect your computer to the Type-c upgrade port of the lens mount adapter with the Type-C cable Support IS image stabilization Support EXIF Info. Transmitting Speedbooster lens mount adapter, can increase the lens 1 f-stop, increasing the amount of light into the virtual background When detaching the adapter, be sure to attach the front rear cap to protect the contacts Focal length is multiplied by 0.71 based on the original data ( equivalent focal length = focal length x 0.71 ), which helps enlarge 1 level aperture. Makes the lens 0.71x wider. Increase maximum aperture by 1 stop. (with a maximum output aperture of f/1.0). Speed Booster lens mount adapter, can increase the lens 1 f-stop, increasing the amount of light into the virtual background 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 ## 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 | #446 in Camera Lens Adapters & Converters | | Customer Reviews | 4.1 4.1 out of 5 stars (18) 4.1 out of 5 stars | | Date First Available | September 25, 2023 | | Item Model Number | MK-EFTR-0.71 | | Item Weight | 10.2 ounces | | Manufacturer | HK Meike | | Product Dimensions | 3.94 x 3.94 x 3.94 inches | ## Images ![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 - Image 1](https://m.media-amazon.com/images/I/61yxGTjkc3L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Very nice speedring *by on Reviewed in the United States June 1, 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. ### ⭐⭐⭐⭐ Meike EFTR-0.71X can be used for Mostly EF lenses only a few EF-S lenses *by on Reviewed in the United States August 10, 2024* Meike EFTR-0.71X Lens Mount Adapter Speed Booster 0.71x Focal Reduction Lens is good.But it can be used for Mostly EF full frame lenses and a few EF-S crop sensor lenses that I own below.The other EF-S lenses, I cannot even mount them. I wish I use it for all of lenses.Yes - Canon EF 50mm F1.8Yes - Canon EF 70-210mm F4Yes - Sigma 18-35mm F1.8No - Canon EF-S 10-22mm F3.5-F5.6No - Canon EF-S 18-55mm F3.5-F5.6No - Canon EF-S 18-135mm F3.5-F5.6No - Canon EF-S 17-55mm F2.8 ### ⭐⭐⭐⭐⭐ Funciona súper bien, lo utilizo en fotografía de prensa y sociales *by on Reviewed in the United States April 22, 2026* Perfecto, el foco funciona bien la nitidez también, el único problema es que hay que darle ok siempre que se enciende el equipo ## 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.lk/products/592092482-eftr-0-71x-lens-mount-adapter-speed-booster-0-71x](https://www.desertcart.lk/products/592092482-eftr-0-71x-lens-mount-adapter-speed-booster-0-71x) --- *Product available on Desertcart Sri Lanka* *Store origin: LK* *Last updated: 2026-08-14*