---
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: "₱29491"
currency: PHP
in_stock: true
reviews_count: 13
category: "Viltrox"
url: https://www.desertcart.ph/products/134935458-viltrox-ef-m2ii-0-71x-speed-booster-ef-to-micro
store_origin: PH
region: Philippines
---

# Auto-focus with aperture control USB firmware upgradeable 0.71x focal reducer for wider FOV 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:** ₱29491
**Availability:** ✅ In Stock

## Summary

> 📸 Unlock epic shots with the VILTROX EF-M2II Speed Booster — your lens’s new best friend!

## 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?** ₱29491 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ph](https://www.desertcart.ph/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

- • **Expand Your Frame:** 0.71x focal reducer boosts your lens to capture more, giving you that coveted wider field of view and 1-stop brighter aperture.
- • **Future-Proof Firmware:** USB upgradeable firmware keeps your adapter cutting-edge with new features and bug fixes—never get left behind.
- • **Perfect Compatibility:** Optimized for Micro 4/3 cameras like GH6, GH5, BMPCC 4K, Olympus EM series, and more—unlock Canon EF lenses’ full potential.
- • **Built to Last & Perform:** Durable metal bayonets with copper contacts ensure rock-solid lens communication and sharp, reliable focusing.
- • **Seamless Autofocus & Aperture Control:** Experience smooth, precise autofocus and adjust aperture directly from your camera for ultimate creative control.

## Overview

The VILTROX EF-M2II 0.71x Speed Booster is a premium focal reducer adapter that lets you mount Canon EF lenses on Micro 4/3 cameras, enhancing your field of view by 29% and increasing light intake by 1 stop. Featuring precise autofocus, adjustable aperture control from the camera body, durable metal construction, and USB firmware upgradeability, it’s designed for serious photographers and videographers using GH series, BMPCC, and Olympus EM cameras who want professional-grade optical performance without breaking the bank.

## Description

desertcart.com : 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 : Electronics

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 | #159 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 | 4.2 out of 5 stars 287 Reviews |
| Exposure Control Type | Automatic |
| Focal Length Description | 50 millimeters |
| Focus Type | Auto Focus |
| Image stabilization | Optical |
| Item Weight | 0.26 kg |
| Lens | Standard |
| Lens Coating Description | Nano Coating or Super Integrated Coating |
| Lens Design | Prime |
| Lens Fixed Focal Length | 10 centimeters |
| 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 | 10 centimeters |
| Media Type | ProductImage, EnhancedContent |
| Minimum Focal Length | 1 millimeters |
| Model Name | EF-M2 II |
| Model Number | 53003867 |
| Number of Diaphragm Blades | 7 |
| Number of Items | 1 |
| Real Angle Of View | 22.5 degrees |
| Unit Count | 1 Count |
| Water Resistance Level | Not Water Resistant |

## Product Details

- **Brand:** VILTROX
- **Camera Lens Description:** 4
- **Compatible Mountings:** Canon EF
- **Focal Length Description:** 50 millimeters
- **Lens Type:** Standard

## 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)

## 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.

### ⭐⭐⭐⭐ Works really well with Canon EF lenses
*by R***R on July 22, 2026*

Not had too much time to use this, just an initial exploration but is seems at first look to be pretty good. Just allowing me to use my L series Canon lens on my OM1 mkii is a huge benefit. The Canon lenses are excellent and I’m hoping to get some decent pictures with this combo. The EF 70-200mm L IS II USM worked well, I was using single point focus. Pretty fast. This combination allowed me to get to f2.0 throughout the zoom range. It worked fabulously with the EF 24-70 f2.8 L II USM through the entire zoom range and wide open (also f2.0). Focus was fast and accurate. 85mm f1.8, worked well. Little (and I mean a little) hunting for focus when wide open (f1.3) but at f16 was fine. I do have a sigma 150-600mm lens for Canon that I did try with this converter but the autofocus was slow, slow enough to make it useless for moving wildlife subjects. It did, however, allow me to shoot at f3.5 at 600mm! That’s more likely down to the lens and not the converter. While this is not perfect it’s worth 4 stars and because it has given me a means of using my canon lenses on my OM1 mkii systems camera I may up that to 5. Very pleased so far. Well worth the money.

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- 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
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*Product available on Desertcart Philippines*
*Store origin: PH*
*Last updated: 2026-08-13*