--- 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" price: "58564 kr" currency: ISK in_stock: true reviews_count: 11 url: https://www.desertcart.is/products/592092482-eftr-0-71x-lens-mount-adapter-speed-booster-0-71x store_origin: IS region: Iceland --- # +1 f-stop aperture boost 0.71x focal length reduction Full EF lens autofocus & stabilization support 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 **Price:** 58564 kr **Availability:** ✅ In Stock ## Summary > 📸 Elevate your Canon APS-C game with pro-level speed and clarity! ## 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 - **How much does it cost?** 58564 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/592092482-eftr-0-71x-lens-mount-adapter-speed-booster-0-71x) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Rugged Metal Build:** Durable, dust- and water-resistant metal construction built for on-the-go pros. - • **Unlock Ultra-Wide Angles:** Transform your APS-C camera into a wide-angle powerhouse with 0.71x focal reduction. - • **Brighter Shots, Better Bokeh:** Gain an extra f-stop for stunning low-light performance and creamy background blur. - • **Customizable Focus Precision:** Adjust gasket thickness to perfect focus alignment and maximize image quality. - • **Seamless Autofocus & Stabilization:** Maintain full EF lens electronic communication for sharp, steady shots every time. ## Overview The Meike EFTR-0.71X Speed Booster is a precision metal lens mount adapter that reduces focal length by 0.71x while increasing aperture by 1 f-stop, enhancing light intake and bokeh for Canon EF lenses on APS-C Canon EOS R7/R10 cameras. It supports full electronic autofocus and image stabilization, features adjustable gasket for focus fine-tuning, and offers durable, weather-resistant construction—all in a lightweight 166g design. ## Description Product description Meike EFTR-0.71X Lens Mount Adapter Speed Booster 0.71x Focal Reduction Ring Meike EFTR-0.71X Lens Mount Adapter Speed Booster Works with: Canon EF series lenses Works with: Canon RF mount series such as Canon RF S35 movie camera or APS-C c amera EOS R7 R10. Features Adapter detail display Firmware upgrade port(Type-C) Connect your computer to the Type-c upgrade port of the lens mount adapter with the Type-C cable Canon RF signal contact Support IS image stabilization Support EXIF Info. Transmitting Canon RF lens mount Speedbooster lens mount adapter, can increase the lens 1 f-stop, increasing the amount of light into the virtual background Canon EF lens mount When detaching the adapter, be sure to attach the front rear cap to protect the contacts 0.71x Speed Booster 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). EF full frame lenses+EFTR-0.71X+RF Cameras APS-C (NO full frame cameras) 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 Review: Funciona súper bien, lo utilizo en fotografía de prensa y sociales - Perfecto, el foco funciona bien la nitidez también, el único problema es que hay que darle ok siempre que se enciende el equipo Review: Meike EFTR-0.71X can be used for Mostly EF lenses only a few EF-S lenses - 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 F1.8 Yes - Canon EF 70-210mm F4 Yes - Sigma 18-35mm F1.8 No - Canon EF-S 10-22mm F3.5-F5.6 No - Canon EF-S 18-55mm F3.5-F5.6 No - Canon EF-S 18-135mm F3.5-F5.6 No - Canon EF-S 17-55mm F2.8 ## 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 | |---------------|-------| | Best Sellers Rank | #825 in Camera Lens Adapters & Converters | | Customer Reviews | 4.0 out of 5 stars 17 Reviews | ## 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) ![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 2](https://m.media-amazon.com/images/I/71ri-QbEUSL.jpg) ![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 3](https://m.media-amazon.com/images/I/71A7tykEiVL.jpg) ![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 4](https://m.media-amazon.com/images/I/61BrfJitXAL.jpg) ![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 5](https://m.media-amazon.com/images/I/61GTswdR2aL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Funciona súper bien, lo utilizo en fotografía de prensa y sociales *by P***O on 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 ### ⭐⭐⭐⭐ Meike EFTR-0.71X can be used for Mostly EF lenses only a few EF-S lenses *by S***G on 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 F1.8 Yes - Canon EF 70-210mm F4 Yes - Sigma 18-35mm F1.8 No - Canon EF-S 10-22mm F3.5-F5.6 No - Canon EF-S 18-55mm F3.5-F5.6 No - Canon EF-S 18-135mm F3.5-F5.6 No - Canon EF-S 17-55mm F2.8 ### ⭐⭐⭐⭐ First one I got did not mount. Meike replaced it and now it works as expected *by R***A on October 4, 2024* This is a revised review. The first adapter I received did not function properly because of a machining error on the bayonet. It wouldn't mount on my Red Komodo and it got stuck on my Komodo X. Because I didn't realize this until after 30 days, Amazon wouldn't take it back. Fortunately, Meike replced my adapter, and the new one works perfectly. It looks great optically and mounts on both Komodo and Komodo X. Thank you to Vincy and Meike for the help and customer service on this. ## 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.is/products/592092482-eftr-0-71x-lens-mount-adapter-speed-booster-0-71x](https://www.desertcart.is/products/592092482-eftr-0-71x-lens-mount-adapter-speed-booster-0-71x) --- *Product available on Desertcart Iceland* *Store origin: IS* *Last updated: 2026-05-29*