Metabones Canon EF lens to Sony NEX Speed Booster



    • Increase maximum aperture by 1 stop.
    • Increase MTF.
    • Makes lens 0.71x wider.
    • Optics designed by Caldwell Photographic in the USA (patent pending).
    • Electronic integration of aperture diaphragm, controlled by or from the camera body.
    • Partial autofocus support for late-model (post-2006) Canon-brand lenses.
    • Powered by camera body. No external power source required.
    • The tripod foot is detachable and compatible with Arca Swiss, Markins, Photo cam ball heads.
    • High performance 32-bit processor and efficient switched-mode power supply.

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  • Both camera-side and lens-side of the adapter are made of brass, precision-machined and plated with chromium.
  • Satin surface finish - just like your OEM lens and camera mounts.
  • Precise fit and solid connection - lens has no play, gap or wiggling when mounted on adapter and no adjustments are required to fit your lens.
  • Designed to reach infinity focus while maintaining the correct registration distance required to maintain optical quality of CRC lenses or lenses with floating elements.



Supported Lenses:

EF lenses
Image stabilization (IS)
Electronic manual focusing (e.g. EF 85/1.2L II and discontinued EF 50/1.0L)
EXIF (focal length, aperture, zoom range)
P, A, S, M exposure modes
Autofocus (see autofocus support section below)
Distance and zoom display on VG and FS series camcorders (see note 1)
Auto magnify (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 3)
EF-S lenses

Not Supported Lenses:
DX lenses
NEX-VG900 (see note 4)
Lens correction such as peripheral shading, CA and distortion
Focus confirmation "chip" (e.g. Dandelion)
M42 screw mount adapters (see note 6)
Stacking non-Metabones/non-Conurus mount adapters on top (see note 7 and list of lenses which require modification below.)
Super-telephoto lenses (see note 8)


1. Requires lenses supporting distance information.
2. Autofocus disabled for Contax N and Contax 645 lenses.
3. A third party zoom lens may need to be registered with the Smart Adapter first in order to detect its maximum aperture. Autofocus is disabled for most third-party lenses.
4. This Speed Booster™ is designed to cover an APS-C image circle which is not big enough to cover a full-size 36mm x 24mm sensor.
5. Sony NEX cameras cannot display aperture values beyond f/1.0. If a f/1.2 Canon EF lens is used with Speed Booster™, the resulting aperture is f/0.9 but the camera body displays f/1.0.
6. 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.
7. 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 Booster™. They need to be modified before they can be safely used on Speed Booster™. 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 Booster™ are not covered by warranty.
8. Super-telephoto lenses such as the Leica-R Telyt 560/5.6 may have significant vignetting in the corners.

Metabones Canon EF lens to Sony NEX Speed Booster