--- product_id: 134935458 title: "VILTROX EF-M2II 0.71x Speed Booster, EF to Micro 4/3 Focal Reducer Booster Adapter Auto-Focus for GH6 GH5M2 BMPCC 4K GH4 GH5 G100 G95 G85 OM-1 EM-1 E-M1X E-M1 iii E-M5 iii E-M10 iv E-M10 iii" brand: "viltrox" price: "€ 431.26" currency: EUR in_stock: true reviews_count: 13 category: "Viltrox" url: https://www.desertcart.gr/products/134935458-viltrox-ef-m2ii-0-71x-speed-booster-ef-to-micro store_origin: GR region: Greece --- # 0.71x Focal Reducer USB Upgrade Ready Auto-Focus Enabled VILTROX EF-M2II 0.71x Speed Booster, EF to Micro 4/3 Focal Reducer Booster Adapter Auto-Focus for GH6 GH5M2 BMPCC 4K GH4 GH5 G100 G95 G85 OM-1 EM-1 E-M1X E-M1 iii E-M5 iii E-M10 iv E-M10 iii **Brand:** viltrox **Price:** € 431.26 **Availability:** ✅ In Stock ## Summary > 📸 Elevate Your Photography Game with VILTROX! ## Quick Answers - **What is this?** VILTROX EF-M2II 0.71x Speed Booster, EF to Micro 4/3 Focal Reducer Booster Adapter Auto-Focus for GH6 GH5M2 BMPCC 4K GH4 GH5 G100 G95 G85 OM-1 EM-1 E-M1X E-M1 iii E-M5 iii E-M10 iv E-M10 iii by viltrox - **How much does it cost?** € 431.26 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/134935458-viltrox-ef-m2ii-0-71x-speed-booster-ef-to-micro) ## Best For - viltrox enthusiasts ## Why This Product - Trusted viltrox brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Seamless Upgrades:** Stay ahead with USB firmware updates for enhanced functionality. - • **Light Up Your Shots:** Boost your aperture by 1 f-stop for stunning low-light performance. - • **Precision Engineering:** Durable metal construction with inbuilt copper contacts for flawless focus. - • **Versatile Compatibility:** Perfectly pairs with a range of M4/3 models for ultimate flexibility. - • **Transform Your Lens Game:** Unlock the full potential of your Canon EF lenses on M4/3 cameras! ## Overview The VILTROX EF-M2II 0.71x Speed Booster is a cutting-edge adapter that allows Canon EF lenses to be used on Micro 4/3 cameras, enhancing focal length and aperture while providing auto-focus capabilities. Its robust design and USB upgrade feature ensure longevity and adaptability for modern photographers. ## Description Product description Make full use of your Canon EF-mount lenses on your Micro Four Thirds mirrorless camera with this EF-M2 II Mount Adapter from Viltrox. This intelligent adapter features gold-plated electronic contacts to maintain autofocus, auto-exposure, and image stabilization capabilities, as well as transfer Exif data and enable aperture adjustment from the camera body. Complementing the electronic design, this adapter is also characterized by its inclusion of a 0.71x-magnification focal reducer, which helps to offset much of the crop factor of Micro Four Thirds cameras while also concentrating the light in order to increase the effective aperture by one stop. Additionally, the adapter also features a durable metal construction and has an integrated 1/4"-20 tripod mount to help support heavier lenses. Main Features - Auto-focus function and inbuilt electronic contacts - Focal length multiplier is 0.71x. Equivalent focal length = focal length x 0.71, which helps enlarge 1 stop aperture - Support aperture adjustment, EXIF signal transmission and USB port for firmware upgrade - Made of high quality metal with surface plating treatment, very durable and sturdy - Gold-plated PINs bring great conductivity of signal transmitting Compatible Lenses: for Canon EF series lenses (please check the details shown in above picture) Compatible Cameras: for M4/3 series cameras Review: Incredible for money!!! - This adapter is incredible for the money. However you will need to rotate the element inside the unit to achieve proper infinity focus. I had to update the firmware for it to work with the pocket 4K. Finally, do not use this adapter past the lenses advertises t stop. For example on the sigma 18/35, this adapter stays sharp all the way to f1.8, but when you use the “boosted” range of f1.2 to f1.8, it becomes a blurry mess. This is where the metabones is better. However it is way more expensive and if you’re happy doing the infinity focus tweak as well as using it within what the lens was designed for, you’re going to be extremely happy. Perfect pairing for the pocket 4K, as dropping the money on the metabones for the pocket 4K puts you at the same price as just getting a pocket 6k anyways. Review: very useful - This speed booster is very useful. Sold at more or less half the price than others, it delivers the same optical quality, good communication between the adapted lens and the camera and it has a very solid construction. I use it mainly with my Sigma 17-50mm f2,8 and my Tokina 12-24mm f4, both Canon EF mount, mounted to my Olympus E-M1 mark II. With this camera they become, respectively, a 24-70mm f2 FF equivalent (the Sigma) and a 19-36mm f2,8 FF equivalent (the Tokina). Focus is still very precise, even if slightly slower than when used on their original mount. Warning: in order to achieve a perfect focus you need to calibrate the speedbooster by phisically turning the optic group. It's very simple and there are lots of videos on youtube explaining the manouver in detail. 100% reccommended. ## Features - Compatibility: Viltrox EF-M2 II is an upgrade version of EF-M2, allowing Canon EF series lenses to be used on M4/3 cameras, such as GH4 GH5 GF6 GF1 GX1 GX7 GX85 E-M5 E-M10 E-M10II E-PL5 - 0.71x Focal Reducer Converter: focal length is multiplied by 0.71 based on the original (equivalent focal length = focal length x 0.71), which helps enlarge 1 stop aperture - AF Functions & Adjustable Aperture: auto focusing function, increasing the lens 1 f-stop and the amount of light into the virtual background, better highlight the theme; adjust the aperture directly from camera to control the lens’ actual aperture - Material & Design: bayonets are made of metal with surface plating treatment, being durable and sturdy; inbuilt copper electronic contacts and IS function, making focus precise and clear, with 1/4" thread tripod foot at the bottom, etc - USB Firmware Upgrade: Equipped with USB interface, can realize software upgrade. Can perfect new functions of the lens mount adapter and fix bugs according to follow-up upgrades. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07RK8CLVV | | Best Sellers Rank | #132 in Camera Lens Adapters & Converters | | Brand | VILTROX | | Camera Lens | 4 | | Camera Lens Description | 4 | | Compatible Camera Models | Olympus E-M1, Olympus E-M10, Olympus E-M10II, Olympus E-M10III, Olympus E-M5, Olympus E-M5II, Olympus E-P1, Olympus E-P3, Olympus E-P5, Olympus E-PL2, Olympus E-PL3, Olympus E-PL5, Olympus E-PL7, Olympus E-PL8, Olympus E-PM1, Olympus E-PM2, Olympus PEN-F, Panasonic G1, Panasonic G2, Panasonic G3, Panasonic G6, Panasonic G7, Panasonic GF1, Panasonic GF2, Panasonic GF3, Panasonic GF4, Panasonic GF5,… | | Compatible Camera Mount | Canon EF | | Compatible Mountings | Canon EF | | Customer Reviews | 4.1 out of 5 stars 286 Reviews | | Exposure Control Type | Automatic | | Focal Length Description | 50 millimeters | | Focus Type | Auto Focus | | Image stabilization | Optical | | Item Weight | 0.26 Kilograms | | Lens | Standard | | Lens Coating Description | Nano Coating or Super Integrated Coating | | Lens Design | Prime | | Lens Fixed Focal Length | 100 Millimeters | | Lens Mount | Canon EF | | Lens Type | Standard | | Manufacturer | Shenzhen Jueying Technology Co., Ltd. | | Manufacturer Part Number | 53003867 | | Maximum Aperture | 1.4 Millimeters | | Maximum Focal Length | 100 Millimeters | | Media Type | ProductImage, EnhancedContent | | Minimum Focal Length | 1 Millimeters | | Model Name | EF-M2 II | | Model Number | 53003867 | | Number of Diaphragm Blades | 7 | | Real Angle Of View | 22.5 Degrees | | Unit Count | 1.0 Count | | Water Resistance Level | Not Water Resistant | ## Product Details - **Brand:** VILTROX - **Focal Length Description:** 50 millimeters - **Lens Type:** Standard - **Compatible Mountings:** Canon EF - **Camera Lens Description:** 4 ## Images ![VILTROX EF-M2II 0.71x Speed Booster, EF to Micro 4/3 Focal Reducer Booster Adapter Auto-Focus for GH6 GH5M2 BMPCC 4K GH4 GH5 G100 G95 G85 OM-1 EM-1 E-M1X E-M1 iii E-M5 iii E-M10 iv E-M10 iii - Image 1](https://m.media-amazon.com/images/I/717w8uWCpHL.jpg) ![VILTROX EF-M2II 0.71x Speed Booster, EF to Micro 4/3 Focal Reducer Booster Adapter Auto-Focus for GH6 GH5M2 BMPCC 4K GH4 GH5 G100 G95 G85 OM-1 EM-1 E-M1X E-M1 iii E-M5 iii E-M10 iv E-M10 iii - Image 2](https://m.media-amazon.com/images/I/7188v8LVMvL.jpg) ![VILTROX EF-M2II 0.71x Speed Booster, EF to Micro 4/3 Focal Reducer Booster Adapter Auto-Focus for GH6 GH5M2 BMPCC 4K GH4 GH5 G100 G95 G85 OM-1 EM-1 E-M1X E-M1 iii E-M5 iii E-M10 iv E-M10 iii - Image 3](https://m.media-amazon.com/images/I/71Mntg7dIwL.jpg) ![VILTROX EF-M2II 0.71x Speed Booster, EF to Micro 4/3 Focal Reducer Booster Adapter Auto-Focus for GH6 GH5M2 BMPCC 4K GH4 GH5 G100 G95 G85 OM-1 EM-1 E-M1X E-M1 iii E-M5 iii E-M10 iv E-M10 iii - Image 4](https://m.media-amazon.com/images/I/818FT9xCQ3L.jpg) ![VILTROX EF-M2II 0.71x Speed Booster, EF to Micro 4/3 Focal Reducer Booster Adapter Auto-Focus for GH6 GH5M2 BMPCC 4K GH4 GH5 G100 G95 G85 OM-1 EM-1 E-M1X E-M1 iii E-M5 iii E-M10 iv E-M10 iii - Image 5](https://m.media-amazon.com/images/I/81-LPH453cL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Incredible for money!!! *by M***R on January 26, 2022* This adapter is incredible for the money. However you will need to rotate the element inside the unit to achieve proper infinity focus. I had to update the firmware for it to work with the pocket 4K. Finally, do not use this adapter past the lenses advertises t stop. For example on the sigma 18/35, this adapter stays sharp all the way to f1.8, but when you use the “boosted” range of f1.2 to f1.8, it becomes a blurry mess. This is where the metabones is better. However it is way more expensive and if you’re happy doing the infinity focus tweak as well as using it within what the lens was designed for, you’re going to be extremely happy. Perfect pairing for the pocket 4K, as dropping the money on the metabones for the pocket 4K puts you at the same price as just getting a pocket 6k anyways. ### ⭐⭐⭐⭐⭐ very useful *by R***U on July 23, 2024* This speed booster is very useful. Sold at more or less half the price than others, it delivers the same optical quality, good communication between the adapted lens and the camera and it has a very solid construction. I use it mainly with my Sigma 17-50mm f2,8 and my Tokina 12-24mm f4, both Canon EF mount, mounted to my Olympus E-M1 mark II. With this camera they become, respectively, a 24-70mm f2 FF equivalent (the Sigma) and a 19-36mm f2,8 FF equivalent (the Tokina). Focus is still very precise, even if slightly slower than when used on their original mount. Warning: in order to achieve a perfect focus you need to calibrate the speedbooster by phisically turning the optic group. It's very simple and there are lots of videos on youtube explaining the manouver in detail. 100% reccommended. ### ⭐ faulty, electronic connection doesn't work *by N***R on January 25, 2025* I tried this adapter with multiple cameras and lenses and each time the camera reads F- and autofocus doesn't work. I tried to update the adapter's firmware, but the drive came up completely empty, no firmware appeared to be installed in the first place. Following the online instructions for updating, I tried dragging the update files onto the adapter drive anyway. When I did, the adapter would not eject. When I unplugged and plugged back in, the drive was completely empty again. Also, the latch that locks the lens onto the adapter doesn't work. It's build so cheaply and it doesn't line up, so you can unscrew the lens without pressing the lever to unlock. Total piece of junk. I returned it and can't believe I paid over $200 what amounts to a junky passive adapter. ## Frequently Bought Together - VILTROX EF-M2II 0.71x Speed Booster, EF to Micro 4/3 Focal Reducer Booster Adapter Auto-Focus for GH6 GH5M2 BMPCC 4K GH4 GH5 G100 G95 G85 OM-1 EM-1 E-M1X E-M1 iii E-M5 iii E-M10 iv E-M10 iii - Blackmagic Design Pocket Cinema Camera 4K (CINECAMPOCHDMFT4K) - [New Version] SMALLRIG BMPCC 4K & 6K Cage for Blackmagic Design Pocket Cinema Camera 4K & 6K w/Cold Shoe, NATO Rail – 2203 --- ## 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.gr/products/134935458-viltrox-ef-m2ii-0-71x-speed-booster-ef-to-micro](https://www.desertcart.gr/products/134935458-viltrox-ef-m2ii-0-71x-speed-booster-ef-to-micro) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-06-01*