---
product_id: 75238702
title: "Commlite CM-AEF-MFT Booster,0.71x Speed Booster for Canon EF Lens to M4/3 Micro Four Thirds Cameras,Autofocus Lens Adapter for Panasonic GH4 GH5 GH5S GF6 GF1 GX1 GX7,Olympus E-M5 E-M10 E-PL5"
brand: "commlite"
price: "€ 424.60"
currency: EUR
in_stock: true
reviews_count: 9
url: https://www.desertcart.gr/products/75238702-commlite-cm-aef-mft-booster-0-71x-speed-booster-canon
store_origin: GR
region: Greece
---

# Fast Autofocus 0.71x Focal Reducer USB Firmware Update Commlite CM-AEF-MFT Booster,0.71x Speed Booster for Canon EF Lens to M4/3 Micro Four Thirds Cameras,Autofocus Lens Adapter for Panasonic GH4 GH5 GH5S GF6 GF1 GX1 GX7,Olympus E-M5 E-M10 E-PL5

**Brand:** commlite
**Price:** € 424.60
**Availability:** ✅ In Stock

## Summary

> 📸 Elevate Your Photography Game!

## Quick Answers

- **What is this?** Commlite CM-AEF-MFT Booster,0.71x Speed Booster for Canon EF Lens to M4/3 Micro Four Thirds Cameras,Autofocus Lens Adapter for Panasonic GH4 GH5 GH5S GF6 GF1 GX1 GX7,Olympus E-M5 E-M10 E-PL5 by commlite
- **How much does it cost?** € 424.60 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/75238702-commlite-cm-aef-mft-booster-0-71x-speed-booster-canon)

## Best For

- commlite enthusiasts

## Why This Product

- Trusted commlite brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Precision Focusing:** Built-in IS function for crystal-clear shots.
- • **Smart Connectivity:** Gold-plated contacts for reliable EXIF data transmission.
- • **Future-Proof Design:** Easily update firmware via USB for optimal performance.
- • **Seamless Compatibility:** Effortlessly connects EF lenses to M4/3 cameras.
- • **Enhanced Aperture Control:** Achieve stunning background blur with a 0.71x focal reduction.

## Overview

The Commlite CM-AEF-MFT Booster is a cutting-edge lens adapter designed to connect Canon EF lenses to M4/3 cameras, enhancing your photography experience with features like a 0.71x focal reducer, fast autofocus, and USB firmware updates for continuous improvement.

## Description

Full description not available

## Features

- 【Compatibility】Compatible with EF Series Lens to M4/3 (MFT/Micro Four Third) Mount Cameras. Panasonic: GX1 GX7 GX8 GX80/85 GH1 GH4 GH5 G2 G3 G5 G7 GM1 GF3 AF100 Olympus: E-M1 E-M1 Mark II E-M5 E-M5 Mark II E-M10 PEN-F E-P5 E-PL13. Please check your cameras or lens fits this lens adapter before you purchase.
- 【0.71x Focal Reducer Booster】CM-AEF-MFT Booster can increase one great of an aperture to blur the background and better highlight the theme. Built-in optical correction group, when using this adapter, the focus of the lens should be shortened by X0.71, and then multiply this data by M4/3 conversion rate, is the approximately M4/3 camera’s actually equivalent focus.
- 【Auto Focus Function and Aperture Control】CM-AEF-MFT Booster with steady, fast and smooth autofocus, let you easy to shoot in the face of fleeting beauty. You can also adjust the aperture of EF lens by control M4/3 camera body.
- 【EXIF signal transmitting and IS Function】Cooper gold-plated contacts with great conductivity enhance the EXIF info. Transmission between lens and camera body. CM-AEF-MFT Booster was built-in IS function, making your focus much more precise and clear.
- 【With USB port firmware update】For adapter firmware update, connect the adapter to the computer with USB cable and execute latest file download from official website. Do not require to attach the adapter to your camera.

## Images

![Commlite CM-AEF-MFT Booster,0.71x Speed Booster for Canon EF Lens to M4/3 Micro Four Thirds Cameras,Autofocus Lens Adapter for Panasonic GH4 GH5 GH5S GF6 GF1 GX1 GX7,Olympus E-M5 E-M10 E-PL5 - Image 1](https://m.media-amazon.com/images/I/61ZXZfqG4nL.jpg)
![Commlite CM-AEF-MFT Booster,0.71x Speed Booster for Canon EF Lens to M4/3 Micro Four Thirds Cameras,Autofocus Lens Adapter for Panasonic GH4 GH5 GH5S GF6 GF1 GX1 GX7,Olympus E-M5 E-M10 E-PL5 - Image 2](https://m.media-amazon.com/images/I/61SvENWbpiL.jpg)
![Commlite CM-AEF-MFT Booster,0.71x Speed Booster for Canon EF Lens to M4/3 Micro Four Thirds Cameras,Autofocus Lens Adapter for Panasonic GH4 GH5 GH5S GF6 GF1 GX1 GX7,Olympus E-M5 E-M10 E-PL5 - Image 3](https://m.media-amazon.com/images/I/61eugwP3BBL.jpg)
![Commlite CM-AEF-MFT Booster,0.71x Speed Booster for Canon EF Lens to M4/3 Micro Four Thirds Cameras,Autofocus Lens Adapter for Panasonic GH4 GH5 GH5S GF6 GF1 GX1 GX7,Olympus E-M5 E-M10 E-PL5 - Image 4](https://m.media-amazon.com/images/I/61pN4YHOjbL.jpg)
![Commlite CM-AEF-MFT Booster,0.71x Speed Booster for Canon EF Lens to M4/3 Micro Four Thirds Cameras,Autofocus Lens Adapter for Panasonic GH4 GH5 GH5S GF6 GF1 GX1 GX7,Olympus E-M5 E-M10 E-PL5 - Image 5](https://m.media-amazon.com/images/I/61eLRe2bjJL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Very well priced well built adapter and a must for micro four thirds shooters.
  

*by G***M on Reviewed in the United States on May 24, 2019*

I am a professional photographer/videographer and needed a speedbooster for my professional work for use with my Panasonic micro four thirds cameras.  This is my review of the budget friendly Commlite EF to MFT speedbooster.  If you don't want to read the entire review my ultimate conclusion is price vs performance this is speedbooster I recommend.Build Quality: It is an all metal construction which is great. The adapter fits snugly to all of the lenses I have attached to it. I have read in other reviews that the connection of the adapter to the camera itself can be a bit loose or can shift slightly however in my testing there is zero shifting or wiggle when connecting to my Panasonic cameras.Photo Usage: It has the contacts for electronic communication so you get all the lens exif data, autofocus control and electronic aperture control. I attached a Canon Nifty Fifty 50mm f/1.8 lens and using this adapter the aputure goes all the way to F/1.3!  Normally the 50mm lens attached to a micro four thirds body give you a field of view of 100m.  With this adapter instead of 100mm it actually increases your field of view to 71mm.  I was very happy with the results I got with this adapter.  Low light situations are no longer a concern for me as this adapter provides that extra stop of light. Autofocus for photos works very well with numerous lenses I tested including the Canon 50mm f/1.8, Canon 70-200 F/4 IS and Sigma 17-15mm f/2.8.  Yes the Sigma 17-50mm APSC lens works great with no vignetting.Video Usage: So most cameras shoot 4k shoot it in a cropped mode. The G7 for example is 2.3x crop.  With this adapter and the increased field of view you get close to a Super35 equivalent.  If you shoot in 1080p your field of view is actually WIDER than Super35. If you use this on a GH5, Black Magic 4k or similar camera you actually get close to full frame field of view.Autofocus: For video if you are using just standard push to focus (tap the screen) the autofocus with this lens is actually quite good and in my testing almost as fast as native Panasonic lenses I own. For photo work I usually use single point autofocus and with this adapter it works great.  In video, if you use continuous autofocus it is slower and can hunt (as with ALL speed boosters even the $600+ ones). Personally I do not use continuous autofocus as I like to have a greater control of focus when shooting video as most experienced videographers do.  My recommendation is to stick to push to focus or fully manual focus which works great with this adapter.Image quality: Compared to a passive adapter the image you get with this adapter can be a bit softer straight out of the camera IF you are shooting at very low aputure.  This is the case with all speedboosters including the much more expensive ones.  I simply closed down the aperture a stop or two and got great results.  This can also be easily addressed in seconds with some sharpening in post be it photo or video. With the Sigma 18-35mm lens starting at roughly 25mm I actually saw no softness with the adapter so perhaps the soft image only happens at very wide angles.Final Notes: I am very happy with this adapter.  It solves all my misgivings regarding the crop factor and low light capability of micro four thirds cameras. The adapter has a USB port for firmware updates to increase compatibility with more lenses. The pricing is fantastic. I recently used this adapter on paid shoot and my client was very happy with the product I provided them and in the end THAT is what matters most.

### ⭐⭐⭐ 3.0 out of 5 stars







  
  
    Does not top the Metabones, but has unique character
  

*by Z***N on Reviewed in the United States on March 26, 2019*

This adapter from Commlite does what you'd expect: reduce the effective focal length and brighten the image. Build materials feel solid and the adapter itself has a good weight to it. The tripod collar is also very snuggly attached so no worries using it as the main mouting point. The only drawback is that the optics are not quite up to the same standards as the metabones. Within 1 stop of being wide open there is noticeable softness especially in the corners of the footage. It was bothersome enough for me that I ended up getting the Metabones, and now having the two side by side there is a significant difference in overall clarity at brighter apertures. Another issue I found between the two is that the amount of focus shifting while zooming in or out (or lack of parfocality) was more pronounced on the Commlite adapter. There are known fixes for this with the Viltrox EF-M2 and Metabones adapters by adjusting the position of the optic in the speedbooster relative to the lens, but I could not figure out a simple way to rotate the optic with the Commlite adapter to test if this would improve the aforementioned lack of parfocality. Needless to say with the Metabones the amount of focus shift is much less pronounced and I actually didn't need to make any adjustments from the stock setting.Overall I would say the Commlite does get the basic job done, and if you like a soft, dreamier image for portrait or narrative work, this will probably suit you just fine. It certainly provides character. But if you're like me and looking for optical clairty and do more landscape or Astro work; or if you shoot a good portion of footage wide open I would recommend passing on the Commlite and just going with the good old gold standard Metabones adapter.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Great build quality! Great Image quality!
  

*by D***A on Reviewed in the United States on October 29, 2018*

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     I wasn't sure what to expect but I took a chance and I'm glad I did. I use a Lumix G7 and up until this point, I've only used native Micro Four Thirds lenses with it.The only lens I used so far with this speedbooster was the Canon EF 55-200 4.5-5.6. Although it's not my favorite lens, everything worked just as it should.Autofocus worked great.EXIF info was all there.Apature was controlled normally although it displayed the lowest number to be 3.2 when it should have said 4.5. Does the speedbooster know that it's making the lens faster or was the camera confused? Either way, the image quality is very good and the lens did seem faster than 4.5.Using the Commlite AEF-MFT didn't feel like using an adaptor. Which brings me to build quality.It's pretty much all metal and feels very well made. The lens felt secure to the body.All that is great but the real question is: How is the image quality? I'm not an expert but in my opinion, I think its virtually unaffected from the lens itself.Excellent value and finally an affordable option for M4/3 users who want to adapt Canon EF glass.My next lens: Sigma 18-35 F1.8

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-02-27*