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VILTROX

VILTROX EF to Micro 4/3 Focal Reducer Booster, EF-M2II 0.71x Speed Booster

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Availability: In Stock.
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Arrives Tuesday, Oct 20
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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
  • 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.

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 Compatible Lenses: for Canon EF series lenses (please check the details shown in above picture) Compatible Cameras: for M4/3 series cameras VILTROX is a competitive manufacturer in the photography equipment industry since 2009. We are passionate about helping you express your uniqueness with our high-value products, including Viltrox camera lenses, mount adapters, LED lights, video monitors. We believe photography plays an important role in the global conservation movement. It helps us observe the world, appreciate her beauty, and protect our biggest inspiration.

Brand: VILTROX


Focal Length Description: 50 millimeters


Lens Type: Standard


Compatible Mountings: Canon EF


Camera Lens Description: 4


Focal Length Description: 50 millimeters


Lens: Standard


Compatible Camera Mount: Canon EF


Maximum Focal Length: 10 centimeters


Minimum Focal Length: 1 millimeters


Lens Design: Prime


Focus Type: Auto Focus


Lens Fixed Focal Length: 10 centimeters


Lens Coating Description: Nano Coating or Super Integrated Coating


Image stabilization: Optical


Real Angle Of View: 22.5 degrees


Maximum Aperture: 1.4 millimeters


Number of Diaphragm Blades: 7


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, Panasonic GF6, Panasonic GF7, Panasonic GF8, Panasonic GF9, Panasonic GH1, Panasonic GH2, Panasonic GH3, Panasonic GH4, Panasonic GH5, Panasonic GX1, Panasonic GX7, Panasonic GX8, Panasonic GX85


Lens Mount: Canon EF


Exposure Control Type: Automatic


Media Type: ProductImage, EnhancedContent


Water Resistance Level: Not Water Resistant


Brand: VILTROX


Camera Lens: 4


Model Name: EF-M2 II


Number of Packs: 1


Item Highlight: 0.71x Autofocus Focal Reducer for Canon EF lenses to M4/3 Micro Four Thirds cameras


Number of Items: 1


Manufacturer Part Number: 53003867


Unit Count: 1 Count


Item Weight: 0.26 kg


Manufacturer: Shenzhen Jueying Technology Co., Ltd.


Model Number: 53003867


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Oct 20

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Very good choice
Excellent choice to the Metabones for a third of the price, you may need to adjust infinity focus or back focus. Fits tight against the body and lens.
Reviewed in the United States on September 20, 2026 by DCP556
    • 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. ... show more
Reviewed in the United States on January 26, 2022 by Mark Boucher
    • Works really well with Canon EF lenses
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. ... show more
Reviewed in the United States on July 22, 2026 by R
    • 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. ... show more
Reviewed in the United States on July 23, 2024 by Roberto Orru
    • faulty, electronic connection doesn't work
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. ... show more
Reviewed in the United States on January 25, 2025 by Natalie Trainor
    • Om1mark ii
So far so good, been playing with the OM 1 Mark II with the adapter, I have a sigma for Canon and a Canon lens. One is F4 one is f 2.8. On my readings I'm getting down to an f2 and an f3 with the adapter but the autofocus is much faster. I'm going to be shooting a wedding This weekend. I like the appearance of it, and from first test, it works well The thing you have to realize about it is you have to twist it in a little more than you're used to with a regular lens. On both ends of the adapter to get it to seat properly and for it to register. If it's not seated it will flicker. ... show more
Reviewed in the United States on September 4, 2024 by sam
    • Works great with Sigma 17-50 and BMPCC4K
Review Image by andy waggoner
Understand that you should update the firmware and set your infinity zoom first so you will be all good. Instructions can be found online and both can be done in 5 mins. This adapter works great with connecting my Sigma 17-50 EF to my BMPCC4K micro 4/3. I get my normal F2.8 down to an F2 and plus a wider frame. Also, keep in mind that the auto focus won’t work with this camera… but I knew that going in and won’t use it anyways. Overall, the adapter does exactly what I need and want it to do at a cheaper cost than its competitors. ... show more
Reviewed in the United States on February 29, 2024 by andy waggoner
    • Not Ideal for Me
When it works, it’s great. I moved from Canon to an OM-1 MkII but I hated to give up my favorite Canon macro lens, the 180mm f/3.5L. I bought this in hope that I could still use it on my new camera, as it was on the list of compatible lenses. I was able to get a couple of shots off before my camera screen went black. I kept having to turn the camera on and off in order to make it work, and sometimes multiple times. Definitely not conducive to an enjoyable shooting experience so I returned it. Side note: I ended up buying a full-frame Canon RP and an EF to R lens adapter which was cheaper than buying an Olympus macro lens! ... show more
Reviewed in the United States on February 1, 2025 by CanonFan

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