---
product_id: 270446399
title: "VILTROX EF-M2II Focal Reducer Booster Adapter Auto-Focus 0.71x for Canon EF Mount Series Lens to M43 Camera GH4 GH5 GF6 GF1 GX1 GX7 E-M5 E-M10 E-PL5"
brand: "viltrox"
price: "₩433462"
currency: KRW
in_stock: true
reviews_count: 5
category: "Viltrox"
url: https://www.desertcart.kr/products/270446399-viltrox-ef-m2ii-focal-reducer-booster-adapter-auto-focus-0
store_origin: KR
region: South Korea
---

# Auto-focus with precise electronic contacts 0.71x focal reducer for wider FOV USB firmware upgrade for future-proofing VILTROX EF-M2II Focal Reducer Booster Adapter Auto-Focus 0.71x for Canon EF Mount Series Lens to M43 Camera GH4 GH5 GF6 GF1 GX1 GX7 E-M5 E-M10 E-PL5

**Brand:** viltrox
**Price:** ₩433462
**Availability:** ✅ In Stock

## Summary

> 📸 Unlock pro-level lens power on your M4/3 – don’t shoot without it!

## Quick Answers

- **What is this?** VILTROX EF-M2II Focal Reducer Booster Adapter Auto-Focus 0.71x for Canon EF Mount Series Lens to M43 Camera GH4 GH5 GF6 GF1 GX1 GX7 E-M5 E-M10 E-PL5 by viltrox
- **How much does it cost?** ₩433462 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/270446399-viltrox-ef-m2ii-focal-reducer-booster-adapter-auto-focus-0)

## 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

- • **Built to Last:** Rugged metal construction with gold-plated pins ensures durability and flawless signal transfer.
- • **Expand Your Frame:** 0.71x focal reducer boosts your lens to capture more, giving you that cinematic edge.
- • **Seamless Autofocus:** Experience lightning-fast, accurate AF on your M4/3 camera with full electronic communication.
- • **Future-Ready Firmware:** USB upgrade port keeps your adapter evolving with new features and bug fixes.
- • **One-Stop Brighter Shots:** Gain an extra f-stop of light for stunning low-light and shallow depth-of-field effects.

## Overview

The VILTROX EF-M2II is a premium focal reducer adapter that converts Canon EF lenses for Micro Four Thirds cameras, multiplying focal length by 0.71x and increasing aperture by 1 stop. Featuring fast autofocus, durable metal build, and USB firmware upgrades, it delivers enhanced image quality and future-proof performance for GH and Olympus series cameras.

## Description

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 - Panasonic GH5/GH4/GH3/GH2/GH1/GF9/GF8/GF7/GF6/GF5/GF4/GF3/GF2/GF1/ GX85/GX8/GX7/GX1/G7/G6/G3/G2/G1 -Olympus E-M10/E-M10II/E-M10III/E-M5II/E-M5/E-M1/E-PL8/E-PL7/E-PL5/E-PL3/E-PL2/PEN-F/E-PM2/E-PM1/E-P5/E-P3/E-P1

Review: This really works and I have no idea how Metabones can be even better. Best benefit for the price. It worked neatly with my Sigma 18-25mm.
Review: quick reliable and great value

## 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 | #86,656 in Electronics ( See Top 100 in Electronics ) #8 in Camera Lens Macro Couplers |
| Item model number | 53003867 |
| Manufacturer | Viltrox |
| Product Dimensions | 2 x 6.7 x 6.7 cm; 260 g |

## Product Details

- **Brand:** Viltrox
- **Compatible mountings:** Canon EF, Micro Four Thirds
- **Focal length description:** 50 millimeters
- **Lens type:** Standard

## Images

![VILTROX EF-M2II Focal Reducer Booster Adapter Auto-Focus 0.71x for Canon EF Mount Series Lens to M43 Camera GH4 GH5 GF6 GF1 GX1 GX7 E-M5 E-M10 E-PL5 - Image 1](https://m.media-amazon.com/images/I/717w8uWCpHL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by F***S on 21 October 2021*

This really works and I have no idea how Metabones can be even better. Best benefit for the price. It worked neatly with my Sigma 18-25mm.

### ⭐⭐⭐⭐⭐ Review
*by B***N on 8 December 2023*

quick reliable and great value

### ⭐⭐⭐⭐⭐ Review
*by T***E on 2 January 2026*

It’s hard to express just how much I love this speedbooster! Never had a problem with it and works great on my BMPCC 4K.

## 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

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-02-26*