F0.74 – new Metabones Speed Boosters break boundaries


Today Metabones release two new Speed Boosters for Blackmagic shooters.

I’ve been using some demo samples for this special review and I’m absolutely stunned.

Metabones and Caldwell Optics have given us a Zeiss / Kubrick / NASA special! These adapters are completely new and purpose designed to fit only the Blackmagic cameras. Offering super bright apertures as fast as F0.74 and finally some great wide angle possibilities, I put both new adapters through their paces…

BMPCC Metabones Speed Booster

Kubrick’s famous Barry Lyndon glass was a 50mm F0.70 and 35mm F0.70. These gave quite a soft glowing image and you can see for yourself because the lenses are now available to rent.

You needn’t bother.

The two new Speed Boosters have a truly remarkable affect on lensing with the Blackmagic cameras.

The results can be extremely sharp even at the super fast apertures now enabled.

Blackmagic’s cameras were previously rather small crop sensor affairs with a 2.39x crop on the BMCC and 2.88x crop on the BMPCC (over full frame, the photographic standard).

There’s a lot of nice MFT and Super 16mm glass around but since most people use a lot of photographic lenses on these cameras, it would be nice to get back to APS-C for Nikon DX or closer to it.


Blackmagic Pocket Cinema Camera and new Speed Booster

BMPCC Speed Booster and standard MFT Speed Booster

Speed Booster accelerates

Key features

  • 0.64x Speed Booster for BMCC with 1 ⅓ stop increase in effective aperture (F1.2 to F0.80)
  • 0.58x Speed Booster for BMPCC with over ⅓ stop increase in effective aperture (F1.2 to F0.74)
  • Sensor 1.53x crop effective on BMCC
  • Sensor 1.74x crop effective on BMPCC
  • On Blackmagic Cinema Camera: true APS-C field of view from DX lenses (180° fisheye remains as such)
  • Adds stepless aperture ring
  • Nikon F-mount (compatible with legacy AI/S and modern G)
  • $489 + shipping/tax
  • Availability start of December 2013

The older Speed Booster for general usage on all Micro Four Thirds cameras has a 0.71x reduction factor.

On the standard adapter a 35mm F2.0 becomes a 25mm F1.4. That same lens on the new Blackmagic Pocket Cinema Camera benefits from a more aggressive 0.58x reduction factor. The new adapters have a rear element which goes right up against the sensor with barely a few millimetres clearance!

My Leica R 35mm F2.0 is now effectively a 20mm F1.2 and ultra sharp wide open.

Here I am shooting with the Samyang 85mm F1.4 on the BMCC version of Speed Booster. This lens goes well with it – very sharp wide open.


The Nikon 50mm F1.2 is transformed into a 29mm F0.74 on the Blackmagic Pocket Cinema Camera.

What this adapter also does is at a stroke solve the wide angle lens conundrum for Blackmagic users.

The effective crop factor for the BMCC is now 1.53x which is a perfect match for Super 35mm and APS-C.

Lenses like the Tokina 11-16mm F2.8 are truly wide (not to mention fast) on the BMCC – just like they are designed to be, on APS-C DSLRs.

On the Pocket Cinema Camera the Tokina is also very wide with the new Speed Booster – a 6.4mm F1.6 at the wide end in fact.

The new effective crop factor if you choose not to use the focal length calculation instead is 1.74x for the Pocket – that’s larger than the GH3’s sensor at 2x crop and the GH2’s wider aspect ratio sensor at 1.86x crop.

11mm x 1.74x = 19mm in terms of a full frame equivalent focal length. That’s very wide!

The Blackmagic Cinema Camera (MFT mount) version of the new Speed Booster has a 0.64x reduction factor – not quite as much as the Pocket version but it still gives you a maximum aperture of F0.80 and makes wide APS-C lenses truly wide again.


Record breaking fast aperture zoom

It’s with the new Sigma 18-35mm F1.8 that I feel this adapter is a massive breakthrough. The two perform superbly together. On the Blackmagic Cinema Camera the Sigma actually breaks a record – the world’s fastest Super 35mm zoom. A stunning 11.5-22.5mm F1.1 with the new BMCC Speed Booster. It goes to F1.05 on the Pocket Cinema Camera and the wide end benefits from actually being wide! Nearly 28mm in full frame terms.

Wide open, the resolving power of this combo is rather good. The video above was shot on both the BMCC (MFT mount – thanks for the loan in Berlin, Lucas) and my Pocket Cinema Camera.

I used the Sigma 18-35mm F1.8 and Samyang 85mm F1.4 on the Pocket Cinema Camera, and the same on the BMCC along with the Nikon 50mm F1.4 and Tokina 11-16mm F2.8. The Samyang F1.4 becomes a 50mm F0.81 on the Pocket Cinema Camera. It’s absolutely beautiful. The Nikon 50mm F1.4 is a bit of a low contrast piece of glass wide open and not as sharp as the others I tested but stills looks lovely.

The Nikon 50mm F1.2 would do better especially stopped down to F2.0.

Now just to be clear – these new Speed Boosters are designed ONLY to fit the Blackmagic cameras. They will not fit a standard Micro Four Thirds camera (due to the space taken up by the shutter mechanism for stills).

They are a major reason to own a Blackmagic camera and the Speed Boosters will be constantly wedded to mine from now on.


Above: Click to download the full 2.5K frame from the Blackmagic Cinema Camera, shot with Sigma 18-35mm F1.8 on the new BMCC Speed Booster

Nikon 50mm F1.2

Nikon’s fastest primes are the F1.2 50mm, 55mm and 58mm, which all improve with the new Speed Boosters in terms of MTF chart performance and brightness. With these lenses you get low light performance on par with the F0.7 NASA / Zeiss lenses for Kubrick but with arguably higher resolving power.


Nikon did not do many F1.2 aperture AI/S lenses and only one is currently in production. However with a more common F1.4 aperture you still get F0.81 on the Pocket Cinema Camera Speed Booster. That gives you stella low light and a much more shallow depth of field than with MFT glass on the Super 16mm sensor with no Speed Booster.

Of the Nikon F1.2 glass, the 55mm is the oldest and was replaced with a 50mm F1.2 in 1978, which is still sold by Nikon today. It performs about the same as the old 55mm but is slightly smaller.

The best performing (by a mile) is the 58mm F1.2 but this is extremely expensive and rare. That’s the lens which will likely outperform the Kubrick / Zeiss 50mm F0.70 when paired with the new Speed Booster. It covers a similar field of view to the Kubrick lens on Super 35mm when paired with Speed Booster on the Blackmagic cameras too. I have a feeling this sentence just bumped a few eBay auction prices up.

Image quality and compromises

Tokina 11-16mm F2.8 on Blackmagic Cinema Camera Speed Booster

During my shoots I discovered that most Nikon mount lenses performed superbly with the new Speed Boosters on both BMCC and BMPCC. The Tokina 11-16mm at the wide end does appear to have very soft corners though. (Click the above image for 1080p version).

Other lenses like the Sigma 18-35mm F1.8 performed superbly – and not just in the centre of the frame.

Here’s a corner crop of the Sigma 18-35mm F1.8 on the Pocket Cinema Camera Speed Booster, shot wide open…


Below is the Nikon 50mm F1.4 at F0.90 on the BMCC Speed Booster, wide open naturally.

It’s not as sharp as the Sigma and not as contrasty but it’s still a very respectable performance considering the speed.

Full shot first (click for 1080p) then the 1:1 crop below that…



There’s some coma but then the Nikon has that wide open, Speed Booster or not.

The only real issues I ran into were when shooting into areas with a lot of bright highlights and dark areas meshing together.

Here for example the flare from the bulbs would ghost into the shadows at the bottom of the frame…


It’s subtle but it’s something to watch out for.

I have more shoots coming up with the new Speed Boosters, mainly with the Pocket Cinema Camera version.

I feel this is the beginning of the journey and there’s a lot of glass I haven’t tried yet. Just to be clear here’s what I have tried:

  • Sigma 18-35mm F1.8 – very punchy contrast, sharp everywhere. Nice and wide now at 18mm
  • Samyang 85mm F1.4 – very nice bokeh and performs stunningly sharp wide open for the price
  • Nikon 50mm F1.4 – very fast wide open at F0.81 (BMPCC) but some coma, contrast lower than Sigma
  • Leica 35mm F2.0 – converted to Nikon with simple mount swap, with new SB on BMPCC is sharper than Voigtlander 25mm F0.95 but just as bright
  • Tokina 11-16mm F2.8 – very wide but some issues with the corners



Well the world has turned on it’s head once more. Suddenly a smaller sensor is an advantage. Remarkably a small sensor is now a hit in low light. Thank goodness we have these innovators on the scene, in an industry dominated by large companies who innovate only for a select few at a huge cost.

At $489 this adapter is a complete steal. It will outlast the camera and I am sure become a big factor in the Blackmagic camera landscape.

Blackmagic may have to bear in mind accommodating it on future revisions of their cameras. The optics are precision designed to match the current camera designs both in terms of sensor size and the physical housing of the sensors. The Blackmagic optimised Speed Boosters are one of the best reasons to own a Blackmagic camera and whenever the next models arrive I want to use them with Speed Boosters like these.

Then we get to the other reasons to own a Blackmagic camera – 12bit raw, ProRes, 2.5K resolution, 13 stops dynamic range and now an effective sensor size equal to Super 35mm, the BMCC is stunning in low light and lensing just became industry standard on it. Not bad for a camera costing under $2000 / 1500 EUR.

As for the Pocket Cinema Camera version, that’s now much easier to work with – a 1.74x crop close to the 1.6x of Canon APS-C and a big difference to the stock Super 16mm 2.88x crop sensor.

This magic comes at a very small price… There’s some ghosting and reflection to watch out for but it occurs only very occasionally in real world shooting. When I first used the Speed Booster, it was on E-mount where it turned the FS100 into a full frame video camera. I feel the new Speed Booster’s are better. The corners are sharper with these smaller crop sensors. Caldwell Optics have clearly been able to push more aggressively and it shows in the image.

Currently only Nikon lenses fit the Blackmagic orientated Speed Boosters (and Leica R glass when converted). There’s no sign of a Canon EF version yet. The EF mount is more accommodating of a wide range of glass like M42, Olympus OM and of course Nikon lenses themselves. But mainly I just want to use my Canon glass on a Micro Four Thirds mount Blackmagic camera. The 85mm F1.2L would be utterly mind-blowing on the new Speed Boosters.

The adapters are available now from Metabones (BMCC version). Check the Metabones website soon for BMPCC version.

Here’s the PDF press release from Metabones

For reference – Kubrick’s F0.70 lenses available to rent (at huge cost)


  • Spellbinding images in low light especially with Sigma 18-35mm F1.8 and ultra fast Nikon F1.2 primes
  • Very good for wide angle lens selection – Tokina 11-16mm now genuinely ultra wide angle on BMCC and wide angle on BMPCC
  • Better corner performance than the E-mount version of Speed Booster
  • Effective Super 35mm sensor size on BMCC
  • Very reasonably priced
  • Excellent build quality
  • Adds stepless aperture ring, without requiring a lens with one
  • Leica R glass easily converts to Nikon
  • Extremely sharp especially in centre of frame and when stopped down slightly


  • Some issues with corner sharpness remains on certain lenses
  • Ghosting and reflection prone in certain shooting scenarios
  • Still no Canon EF mount version