Full-Frame Look on EOS M – Metabones EF to EOS M Speed Booster ULTRA 0.71x

May 14th, 2019
Full-Frame Look on EOS M – Metabones EF to EOS M Speed Booster ULTRA 0.71x

Metabones, a company that is known for making premium, innovative lens adapters, has just released their new Metabones EF to EOS M Speed Booster ULTRA 0.71x. This adapter allows you to mount full-frame Canon EF lenses on Canon EOS M cameras, while “increasing” the native aperture of the lens by one stop and reducing the crop factor by 0.71x. Let’s take a look at it! 

Metabones_EFEOSM_Featured

Canon EOS M Cameras

Initially launched in 2012, the Canon EOS M line of cameras never really drew too much attention. Many EOS M cameras were launched, like the EOS M/M2/M3, the M10 that we reviewed, and the latest EOS M50, which is currently the top-of-the-line camera of this ecosystem. The EOS M50 is a pretty decent camera, it features a 24.1MP CMOS APS-C sensor, and can record in 4K UHD at up to 25 frames per second, and in 1080P at up to 60 frames per second. It’s not the most excellent camera of all time, but if you are looking for something compact and intuitive, it can get the job done.

Metabones_EFEOSM_01

Image credit: Tinh Khuong

The real problem with EOS M cameras is the lack of quality native lenses. There are only four zoom and three prime lenses available in EF-M mount. Also, with the launch of the new line of EOS R mount cameras, I doubt Canon will continue to develop any new glass for the EOS M line. So – here comes Metabones with their new Canon EF to EOS M Speed Booster ULTRA 0.71x.

Metabones EF to EOS M Speed Booster ULTRA

Metabones is famous for making quality lens adapters. Back in 2013, they were the first to introduce an EF to E-mount “Speed Booster” adapter with a lens inside to reduce the crop factor of the camera and even more, increase the aperture of the lens by one stop.

This new Metabones EF to EOS M Speed Booster ULTRA 0.71x is no different. It will reduce the 1.5x crop factor of EOS cameras down to 1.07x and make your lens one-stop faster. For example: it “converts” a Canon 24-70mm f/2.8 into the field-of-view of a 17-50mm f/2.0 on an APS-C sensor and a Canon 50mm f/1.2 to a whopping 35.5mm f/0.9 field-of-view.

It is compatible with all full-frame Canon EF lenses. Also, it is compatible with EF-S lenses, but you’ll need to modify your glass, which may result in vignetting. When using the adapter, most of the features of the camera and lens are natively supported, like image stabilization and autofocus, except lens aberration correction. The EXIF metadata is changed to reflect the faster aperture and shorter focal length.

Metabones_EFEOSM_02

Image credit: Metabones

The Speed Booster ULTRA uses an advanced 5-element/4-group optical design by Caldwell Photographic Inc. that, according to Metabones, helps to “achieve extraordinary optical performance with improved corner sharpness, distortion and reduced vignetting.”

Pricing and Availability

A few adapters are already available if you want to mount EF glass on an EOS M camera, from companies like Canon, Commlite, Fotga and so on. But none of these adapters can do what the Metabones Speed Booster does. Only Viltrox has a Speed Booster for EOS M, but we don’t know about its quality as we haven’t touched it yet.

The Metabones EF to EOS M Speed Booster ULTRA 0.71x is available right now for $479.

What do you think of this new Metabones Speed Booster adapter? Do you use Canon EOS M cameras? Do you already own some Metabones lens adapters? Don’t hesitate to let us know in the comments!

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Alex
Alex
GuestMay 14th, 2019

I think it is overpriced. M50 plus this speedbooster plus $100 equals RP camera.

Taylor
Taylor
GuestMay 14th, 2019

It’s way overpriced, with Viltrox offering the same product for $150 metabones is going to have to find some way to react to not being the only player in the game anymore

 Mark Cooper
Mark Cooper
MemberMay 14th, 2019

From what Ive read on the Viltrox its a quality product. $480 is ridiculous !!!

Quinten
Quinten
GuestMay 17th, 2019

The viltrox is fine for cameras at this price point.

 Kenneth Soto
Kenneth Soto
MemberAugust 6th, 2019

But you gain 24p in 1080p. Also, the RP’s DR is rubbish, so I’d gladly give up 2MP, and downgrade to an APS-C sized sensor with better DR, and I still save a $100!

Keep in mind though, gray market M50s can be had for around $450, so you can get it significantly cheaper than a gray market RP.

 Miklos Nemeth
Miklos Nemeth
MemberMay 15th, 2019

The high quality focal reducers (speed boosters) are more interesting for EOS R since its ludicrous 1.8x 4K crop. The APS-C EOS M crops 4K, so to get decent Canon 4K, you need EOS R with a speed booster; or, just use EF-S lenses on EOS R. This 1.8x 4K crop experience was so frustrating that I sold all my Canon gear, never again Canon, until they can implement full-sensor downsampling 4K, just like Panasonic, Nikon, Fujifilm, Sony.

 Kenneth Soto
Kenneth Soto
MemberAugust 6th, 2019

Absolutely correct! Metabones needs an EF-RF Speedbooster ASAP.

Brian
Brian
GuestMay 15th, 2019

I recently bought the Viltrox speed booster, and it’s PERFECT! The build quality is excellent, the image quality is wonderful, and the price is superb! It’s a solid piece to have in your arsenal if you’re using the M50 and want to get more from it. Having used it for about 3 weeks, I’m kicking myself for not purchasing it sooner!
I love it attached to my 50mm, as well as my 28-135, but now wishing I hadn’t traded in my 70-200L.
If you’re looking to get that full frame feeling on a limited budget, go get one of these Viltrox adapters. If you have the money, Metabones is also worthy, but why pay more for the same?

Brandon
Brandon
GuestMay 16th, 2019

I don’t think your crop factor calculations are correct. How could this make a lens effectively wider than full frame on a crop sensor?

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