Metabones Speed Booster for Micro Four Thirds Starting to Make Appearances


Back in January 2013, lens adapter company Metabones rocked the camera world by announcing the Speed Booster, an SLR-to-mirrorless lens adapter that can magically increase your maximum aperture, sharpness, and angle of view.

So far the adapter has been released for Sony NEX and Fuji X cameras, but greater things are on the horizon: Metabones will be releasing the Speed Booster for Micro Four Thirds cameras as well.


As you can see from the screenshot above, filmmaker Philip Bloom already got his hands on a Speed Booster, which he’s using on a Blackmagic Cinema Camera (the camera has a MFT mount). In the description of the Instagram photo, Bloom writes,

The making of the Blackmagic Cinema Camera? Absolutely. @metabones Speed Booster this is C/Y version. Quite a difference! Leica R version coming too then Nikon then Canon.

Andrew Reid of EOSHD, another person lucky enough to get his hands on a pre-release unit, writes that he believes, “Micro Four Thirds needs the Speed Booster more than any other camera.”

So soon you’ll be able to use Contax/Yashica, Leica, Canon, and Nikon lenses on your Micro Four Thirds camera, and take advantage of benefits that standard adapters can’t offer.

Your lens’ light will be refocused onto the smaller sensor, increasing your maximum aperture by 1 stop, increasing the MTF (i.e. sharpness), and making your lens wider by a factor of 0.71x. The resulting crop factor will be roughly 1.4x, or what you’d get by attaching a full frame lens to a APS-C camera.


If you already have a sweet collection of lenses for your SLRs, you’ll be able to use them on your MFT camera without a major crop factor interfering with your work. For example, a 21mm f/2.8 lens would look like a 42mm when mounted to a Micro Four Thirds camera using a standard adapter.

The Micro Four Thirds Speed Booster was originally set to arrive in April 2013, but Metabones recently announced that the launch has been pushed back to the second half of 2013.

P.S. This video uploaded to YouTube also suggests that the Speed Booster will be arriving for Canon’s EOS M mirrorless camera as well:

Thanks for sending in the tip, Tulio!

  • Thiago Medeiros

    Metabones told me a few weeks ago via Twitter that the M4/3 SpeedBooster will support Nikon G lenses (i.e., those with no aperture ring). Definitely gonna buy one.

    Now, if they provide even rudimentary AF with Nikon lenses, i’ll buy like a dozen and give them to my loved ones as proof of my profoundest love.

    ❤❤❤ Metabones❤❤❤Caldwell❤❤❤

  • Tommy Sar


  • Mansgame

    lol they won’t be around for long. Nikon already has the same theory in their new f/1.2 lenses and it won’t be long before others follow.

  • ISO640

    How long do we Panasonic m43 users have to wait for one of these adapters? I’d like to use my Nikon lenses on my GX1 (I know there are adapters out there already but this one sounds slightly smarter than the others).

  • geodesigner

    All we know is that they promised it on “the second half of 2013″ :)

  • geodesigner

    All we know is that they promised it on “the second half of 2013″ :)

  • Zos Xavius

    this adapter looks awesome until you see the distortion it creates. for some subjects that might not be a problem, but its going to be pretty noticeable if you are shooting anything with straight lines. olympus uses a similar concept in some of their 4/3 lenses, but since they are designed with the lens they can be more well corrected. this is a cool adapter and probably a huge deal for m4/3 video shooters, but like anything it comes with compromises. nobody seems to mention that. the MTF gains are only because you are adding the resolving power of the rest of the glass into image circle and not just taking from a cropped portion of the image from the center of the glass. if the glass is already sharp in the center and outresolving the sensor there, then you won’t be gaining any resolution at all. Maybe even losing it where the edges of the glass are not as sharp.

  • tttulio

    The MFT version doesn’t remove the sensor crop factor entirely as it does on the NEX version. Here is Phillip’s comparison video:

  • Swade

    In their new f/1.2 lens? You mean the plethora of ones they have requested patents for but have never released? Oh ya, their f/1.2 lens can make itself a f/1.0 lens. How stupid of me to forget.

  • ISO640

    Thanks for the info!

  • Jesus Gutierrez

    Problem with the MFT/EF speedbooster for the BMCC camera is that the BMCC is passive mount. all EF zooms and most EF primes require active mount to adjust iris you’re stuck with a small number of manual EF lens, which makes it pointless unless they include a dial in IRIS on the speedbooster like the redrock.