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VILTROX

VILTROX EF-EOS M2 Speed Booster 0.71x Canon EF Lens to EF-M Mount Speedbooster for Canon m50 ii m6 ii m200 m50 m6 m5

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Size: EF-M Speed Booster Adapter


Features

  • Allows the aperture increased by one level while the focal length is reduced (equivalent focal length= focal length x 0.71 x 1.6), increase the lens 1 f-stop, Bring better photo bokeh.
  • Signal transmission using PIN gold needle, greatly enhanced its transmission performance, real-time preview of photo information on camera, full compatible with Canon lens and camera features, e.g. autofocus, image stabilization, auto aperture adjustment, etc.
  • 4 lens elements in 4 groups for optical clarity as well as color fidelity.Detachable tripod foot with 1/4"-20 accessory thread for direct attachment to tripods or quick release plates that feature 1/4"-20 mounts.
  • USB upgrade port: Through continuous software updates, VILTROX will help users get better shooting experience, fix product bugs and constantly adapt to the new EF lens, provide more Canon lens and camera combinations.

Brand: VILTROX


Focal Length Description: 25 millimeters


Lens Type: Standard


Compatible Mountings: Canon EF-M


Camera Lens Description: 4


Package Dimensions: 4.3 x 4 x 2.5 inches


Item Weight: 5.1 ounces


Item model number: EF-EOS M2


Is Discontinued By Manufacturer: No


Date First Available: November 1, 2018


Manufacturer: Shenzhen Jueying Technology Co., Ltd.


Frequently asked questions

A speed booster, like the VILTROX EF-EOS M2, is an adapter that allows you to use Canon EF lenses on EF-M mount cameras, such as the Canon M50 II or M6 II, among others. Besides enabling the lens mount compatibility, it also effectively reduces the focal length multiplier by 0.71x, which means you get a wider field of view and more light, enhancing low-light performance and potentially improving image quality.

While the VILTROX EF-EOS M2 is designed to adapt Canon EF lenses to EF-M mount cameras, there might be compatibility issues with certain lenses, especially third-party ones. However, most Canon EF lenses, including primes, zooms, and professional L-series lenses, should work well with this adapter, providing full electronic communication for autofocus and aperture control.

The VILTROX EF-EOS M2 adapter is designed to maintain electronic communication between the Canon EF lens and the EF-M mount camera, supporting autofocus functionality. While in most cases, autofocus speed and performance are preserved, there might be slight variations depending on the lens and camera model used. Some users may experience a minimal lag in autofocus speed, but it generally remains functional for most photography and videography purposes.

The VILTROX EF-EOS M2 includes optics that can affect the image projected onto your camera's sensor. Due to the 0.71x magnification reduction, the adapter can actually increase the amount of light entering the lens by about one stop, potentially enhancing image quality in low-light conditions. However, the impact on sharpness and distortion will vary by lens. Most users find the image quality excellent, with minimal to no noticeable degradation.

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Top Amazon Reviews

šŸš€ Abunda's Overview

This is our summary and key points to consider based on customer reviews.

The Viltrox EF-EOS M2 Lens Adapter revolutionizes Canon M50 usage by enabling EF lens compatibility, significantly enhancing photographic capabilities. Users celebrate the adapter's ability to provide nearly full-frame imaging and an additional f-stop for lenses, thereby improving low-light performance and depth of field control. While the adapter primarily supports EF lenses, its build quality and functional integration with the cameraā€™s electronics like autofocus and stabilization are highly praised. The product's value is underscored by its affordability and the quality it brings to photography, particularly appreciated by beginners and enthusiasts seeking professional-grade results without a hefty investment.

Pros

  • šŸ“ø Enables EF lens compatibility with Canon M50, expanding creative options
  • šŸ”© High build quality matching that of Canon's own products
  • šŸ’” Provides an additional f-stop, enhancing low-light performance
  • šŸ”„ Supports autofocus and stabilization features seamlessly
  • šŸ’° Offers great value by improving lens functionality at a low cost

Cons

  • ā— Does not support EF-S lenses with speed booster functionality
  • āš™ļø Some users experienced initial malfunctions requiring replacements

Should I Buy It?

If you own a Canon M50 and seek to enhance its photographic capabilities without breaking the bank, the Viltrox EF-EOS M2 Lens Adapter is a compelling purchase. It unlocks a broader range of lens compatibility, improves image quality in low-light conditions, and maintains integral camera functions. Though it falls short for EF-S lens owners needing speed booster capabilities, its pros overwhelmingly make it a valuable tool for photographers. Highly recommended for those looking to maximize their M50ā€™s potential on a budget.

    • Nicely made for the price.
Size: EF-M AF Mount Adapter
I does the trick and the build quality is solid.
Reviewed in the United States on January 4, 2026 by Drew
    • If you own an M50 this product will open up you lens choices drastically.
Size: EF-M Speed Booster Adapter
This product, and all their products have changed the way I use my cameras. I can now use all my EF mount lenses with my Canon M50. The build quality is as good as Canon, or any other high end lens I've used. Fit was perfect and all electronics worked flawlessly (auto focus and stabilization). This now expands the lenses made for the M50 from 6 to all the EF lenses (which is many). The one thing to take note, before purchasing, is that only EF lenses work on this adapter and not EF-S mount lenses. I don't understand why they can't make a speed booster to allow the use of myEF and EF-S lenses though. The non speed booster version of this product (the one with no optics in it) that they make, allow me to use both types, why can't they make a speed booster that accepts all my EF and EF-S lenses like their cheaper adapter? Besides that one issue, I still recommend this product. It will open up your lens choices for your Canon M50 and is made of nothing but the best quality material. ... show more
Reviewed in the United States on October 19, 2019 by Hayes Tech
    • It works perfectly
Size: EF-M AF Mount Adapter
šŸ’ŖšŸ½šŸ˜Š
Reviewed in the United States on December 28, 2025 by Karl mayala
    • Absolutely awesome + 1 f-stop!!!
Size: EF-M Speed Booster Adapter
Review Image by David David
Review Image by David David
Review Image by David David
Review Image by David David
So I got myself a Canon M50. Very similar to the Canon 77D I already owned features-wise, but significantly smaller and lighter. I was a little bummed that I needed to get all new glass because of the EF-M mount, but then it turns out that thereā€™s adapters that let you use your EF and EF-S lenses on the EF-M mount, albeit with the same 1.6x crop factor as my 77D, both being crop-sensor cameras. I'd been watching M50 review videos on YouTube and in one of them someone mentioned the Viltrox EF-EOS M2 Lens Adapter. Honestly, it sounded too good to be true at first. So youā€™re telling me I get an adapter that will make my EF lenses look almost their actual focal length (about 1.1x instead of 1.6x) AND also gain a full f-stop for about 150 USD? Yeah, rightā€¦ I kept watching reviews on the Viltrox adapter until curiosity finally got the best of me. I ended up buying one from Amazon, hoping for the best. First thing I did, I had to try my beloved nifty-fifty (EF 50mm f/1.8 STM lens). Using the Viltrox adapter it now looks like a 56-57 mm lens (50 * 1.6 * .071) which is not bad at all. But wait, when using the lens and adjusting the aperture on the camera, it didnā€™t stop at f/1.8 but rather all the way down to f/1.2! My lens, brand new, goes for 125 USD on Canonā€™s website. The 50mm f/1.2 also on Canonā€™s website goes for 1,349 USD. Iā€™m getting the aperture of a 1,300 dollar lens for less than 300 dollars (lens + Viltrox adapter). Sure, itā€™s not quite the same but Iā€™m very much a beginner/enthusiast, so it's more than enough for me right now. Thatā€™s an excellent price point for such an awesome aperture on a prime lens. Thatā€™s only talking about the one lens, though. Got any EF lenses sitting around? Pop them into this glorious thing right here and get almost full-frame images out of them with extra aperture. Couldnā€™t be happier with my purchase. Get this adapter NOW! ... show more
Reviewed in the United States on August 14, 2019 by David David
    • Nice little adapter
Size: EF-M Speed Booster Adapter
This is a great adapter it allows you to use you old canon lenses and still gives you crisp photos. The only drawback is that there is a crop factor
Reviewed in the United States on December 27, 2025 by Tat2dean
    • Good value.
Size: EF-M AF Mount Adapter
Works perfectly. Well built.
Reviewed in the United States on October 3, 2025 by VetteLover
    • Great if you have a lot of EF Glass
Size: EF-M Speed Booster Adapter
Review Image by DaVo DaVo
Review Image by DaVo DaVo
Review Image by DaVo DaVo
The media could not be loaded. One thing that hasn't been clear to me and I don't blame this on the manufacture Viltrox but on the many reviews out there. I didn't notice until I began to use the speed booster that it will only work with EF Lenses, not EF-S lenses. Yes, this should have been a given with the idea being that this will take a mirrorless crop sensor camera and turn it into a full frame camera. Now on the subject of Full frame. I'm using this with a Canon M50. Which has a crop factor of 1.6. This booster gives a plus 0.71. Meaning that this crops 1.136. For example EF 50mm 1.8 with the adapter is an 80mm with the booster it is a 56.8mm and also drops the F down to 1.2. The images and video were all shot using the Canon 50m 1.8 STM. the first image is with the speed booster with aperture at1.2. The second is with the booster at 1.8. The third is with the Canon EF-m to EF adapter with the aperture set at 1.8. The video is with the speed booster. I have used this both for images and video. With video, I haven't really noticed any issues other than the motor makes does make more noise than usual and the autofocus seems slightly slower when changing the autofocus from one subject to the other. The 50mm is dead silent when used without the booster, so I'm guessing that this is the motor in the booster. When tracking I've noticed no issue beyond the focus motor sound. Who should buy this and who shouldn't? If you already have a collection of EF Full Frame lenses, slap this thing on and Bob's your uncle. If you are just starting out and on a budget, the EF-M to EF adapter may be a better option because you can use both EF and EF-S lenses. EF-S lenses tend to be cheaper and THEY WILL NOT WORK WITH THIS SPEED BOOSTER. ... show more
Reviewed in the United States on April 25, 2019 by DaVo DaVo
    • perfecto
Size: EF-M AF Mount Adapter
esta bien
Reviewed in the United States on January 27, 2026 by Manu Franco

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