Canon EF Lens to BMPCC T Speed Booster 0.58x (BMMCC and BMMSC4K compatible)

Key Features


  • Increase maximum aperture by 1 2/3stop. (with a maximum output aperture of f/0.74)
  • Increase MTF.
  • Makes lens 0.58x wider.
  • Optics with 6 elements in 4 groups, designed by Caldwell Photographic in the USA (patent granted).
  • Build-in electronics to control lens aperture.
  • The Lens aperture is set by the controls on the camera body.
  • Powered by camera body. no external power source required.
  • High-performance 32-bit processor and efficient switched-mode power supply.
  • The tripod foot is detachable and compatible with Arca Swiss, Markins and Photo Clam ball heads.
  • Flocking material coating inside the inner hole to reduce the internal reflection.

Optics designed by Caldwell Photographic in the USA.


Canon EF to BMPCC T Speed BoosterTM  adapters designed exclusively for the original Blackmagic Pocket Cinema Camera (BMPCC), Blackmagic Mirco Cinema Camera (BMMCC) and Blackmagic Micro Studio Camera 4K (BMMSC 4K). They cannot be attached to any JVC, Olympus or Panasonic cameras and they cannot be used with the newly released Blackmagic Pocket Cinema Camera 4K.

The new 0.58x Speed Booster reduces the crop factor of the BMPCC from 3.02x to 1.75x and produces the largest aperture optics currently available, with a maximum output aperture of f/0.74. 

Here are a few examples:

Master Lens

with Speed Booster


35mm equivalent focal length 

on BMPCC  *


Canon 85mm f/1.2

49.3mm f/0.74


extremely fast tele

Sigma 18-35mm f/1.8

10.5-20.3mm f/1.0


 super fast and stunningly sharp zoom

Sigma 8-16mm f/4.5-5.6

4.6-9.3mm f/2.6-3.2


 super wide zoom

Sigma 30mm f/1.4 Art

19.3mm f/0.81


 super fast and sharp standard lens

Tokina 11-16mm f/2.8

6.4-9.3mm f/1.6


 very fast and sharp wide-angle zoom

*) Based on diagonal field of view


Table of compatibility and resulting crop factors with different SpeedBoosterTM:

Supported Not supported 

EF lenses

BMPCC (original version only), BMMCC and BMMSC 4K

Image stabilization (IS) lenses

Autofocus (from firmware V2.1) 

Electronic manual focusing (e.g. EF 85/1.2L II and discontinued EF 50/1.0L)

EXIF (focal length, aperture, zoom range)

Distance and zoom display on BMPCC camcorders (see note 1)

Contax N mount lenses modified to Canon EF by Conurus (see note 2)

Contax 645 NAM-1 adapter modified to Canon EF by Conurus (see note 2)

Sigma, Tamron and Tokina lenses in Canon EF mount (see note 2)


EF-S lenses

GH5, GH5s, GH4, GH3, GH2, GH1


Lens correction such as peripheral shading, CA and distortion

Focus confirmation "chip" (e.g. Dandelion)

M42 screw mount adapters (see note 5)

Stacking non-Metabones/non-Conurus mount adapters on top (see note 6 and list of lenses which require modification below.)

Lens: Tamron SP 17-50mm F/2.8 XR Di II VC


  1. Requires lenses supporting distance information.
  2. A third party zoom lens may need to be registered with the Speed Booster/Smart Adapter first in order to detect its maximum aperture. 
  3. This Speed Booster is designed to cover a BMPCC image circle which is not big enough to cover a full-size 36mm x 24mm sensor.
  4. For use with fast lenses (faster than f/1.8), the pre-boost apertures will be displayed in the camera.

    Slow lenses will report boosted apertures to the camera body but fast lenses will report pre-boost apertures. We won't show f/0.7 with a f/1.2 lens attached, but show f/1.2 instead. 


    a) EF 85/1.2L attached, camera display = f/1.2, physical aperture  (lens + Speed Booster combined) = f/0.74.
    b) Sigma 18-35/1.8 attached, camera display = f/1.0, physical aperture (lens + Speed Booster combined) = f/1.0.

  5. Some improperly-made M42 screw mount adapters may short the electronic contacts of the Speed Booster and cause damage to the Speed Booster and/or camera body.
  6. Many manual focus lenses (e.g. OM 28/2.8, OM 50/1.8, Leica R 15/3.5) have rear protrusions (spikes, levers, other appendages) which would damage the optics and/or housing of Speed BoosterTM They need to be modified before they can be safely used on Speed BoosterTM Check and make sure there are no rear protrusions from the adapter/lens combination before using on Speed Booster. Scratches and damages caused by rear protrusions on Speed BoosterTM are not covered by warranty.
  7. This Speed Booster is NOT fully compatible with GH5 or other MFT camera. This is used only with BMPCC, BMMCC and BMMSC4K. When Speed Booster® is used with other MFT camera, it may cause damage to the camera.

List of lenses (have been tested by metabones) with support on EF-BMPCC Speed Booster. (Lenses which have been tested with EF-E Speed Booster may refer to EF-E Speed Booster product page.)

Canon EF zooms

Canon 20-35mm3.5-4.5

Canon 28-80mm2.8-4L

Canon 70-200mm2.8L

Canon 24-70mm2.8_II

Canon 24-105mm4_L

Canon 70-200mm4_L

Canon 70-300mm4-5.6L

Canon 70-300mm4-5.6

Canon EF primes

Canon 50mm1.8

Canon 50mm1.4

Canon 85mm 1.2

Canon 100mm 2.8


Sigma 18-200mm3.5-6.3

Zeiss 35mm2


List of manual focus lenses which REQUIRE MODIFICATION to be used on Speed Booster

Many manual focus lenses have rear protrusions (spikes, levers, other appendages) which would damage the optics and/or housing of Speed BoosterTM They need to be modified before they can be safely used on Speed BoosterTM Check and make sure there are no rear protrusions from the adapter/lens combination before using on Speed Booster. Scratches and damages caused by rear protrusions or by poor quality adapters are not covered by warranty. The following is an incomplete list of lenses known to be incompatible.

Leica R

Super-Elmar-R 15mm

Elmarit R 28/2.8

Elmarit R 35/2.8

Summicron R 50/2

Nikon F

20/2.8 AI-S

Olympus OM

OM 18/3.5

OM 21/2

OM 21/3.5

OM 28/2.8

OM 50/1.8

Pentax K

Every Pentax K-mount lens has a protruding fin and an aperture lever. It does NOT fit.


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Disclaimer: we are NOT licensed, approved or endorsed by Micro Four Thirds or Canon.

Why Metabones®?

Since its inception, Metabones has been designing and manufacturing lens adapters recognized among professionals and enthusiasts as leaders in design and workmanship.

Contrary to the popular trend of other factories using an aluminum ring painted black on the camera-body-side, we instead take no short-cut but use precision-machined brass with chromium plating on both the camera-body and the lens sides of our adapters, in order to ensure smooth mounting, great appearance, and durability. The lens side of the adapter features a strong leaf-spring structure, strengthening the adapter-lens connection and ensuring tightness of the lens in order to reduce wear and prevent focus errors and optical alignment issues from appearing.

Metabones uses matte-black treatment to keep internal reflection to a minimum in order to maintain the maximum optical quality possible with the lens.

All Metabones Adapters follow this tradition of uncompromising precision, robust build quality and outstanding finish. Our new Smart AdapterTM series of products add industry-leading electronic interfacing technology from Canada, with true electronic control of the lens' aperture directly from the camera body.


Our Smart AdapterTM  series adapters have the following additional features