Key Features
Features and Benefits
Limitations
Electronic
Autofocus
Can be powered either by camera body or by third-party external 5V power source (not included)
Irisaperture controlled by the camera body
Smooth iris support with the latest Canon (2009+), Tamron (SP series 2013+) and Sigma (2016+) lenses
Image stabilization (IS) lens support
Support for cameras with in-body image stabilization (IBIS), including Panasonic GX7, GX8, GX8085 and Olympus cameras
Electronic manual focusing (e.g. EF 851.2L II and discontinued EF 501.0L)
EXIF (focal length, aperture, zoom range)
Distance and zoom display on camcorders (requires lenses supporting distance information)
Cinema EOS lens support (CN-E 18-80mm T4.4 L), including AF (requires external 5V power through micro USB port), auto iris and servo zoom
Other
Detachable tripod foot compatible with Arca Swiss, Markins and Photo Clam ball heads.
The opening is flocked with felt material to reduce internal reflection.
Compatible with all MFT mount cameras, including GH4, OM-D, Blackmagic Cinema Camera, Blackmagic Pocket Cinema Camera and JVC GY-LS300.
Supports EF-S lenses.
No video AF for Olympus
AF may not work if the maximum aperture of the lens plus any EF Extender or other teleconverter attached is smaller than f8.
AFC (continuous AF) and AFF (flexible AF) modes are not supported, except on Olympus OM-D E-M1.
Panasonic video AF may hunt more than a native lens or have unsatisfactory performance.
Some Tamron lenses may have unsatisfactory AF accuracy.
No support for Focus Stacking and Focus Bracketing on Olympus.
On Olympus, other than E-M1, you may move the single AF point among any of the 81, but you may not multi-point AF. There is no restriction on E-M1 and Panasonic.
Very early Olympus models (e.g. E-PL1) have no autofocus support.
EF-mount lenses are not silent but may make audible click noises during autofocus operation and iris changes which may be picked up by the built-in microphone of the camera. An external microphone is recommended for video.
Use of Canon Cinema lenses such as CN-E 18-80mm T4.4 L IS KAS S for still photography is not supported.
Iris changes are in 18 stop steps which may be noticeable in video recordings. Programmed exposure mode and shutter priority exposure mode should not be used for video. This limitation does not apply to Cinema EOS lenses which permit fine resolution iris control, such as CN-E 18-80mm T4.4 L IS KAS S.
No support for in-camera correction such as peripheral shading, CA and distortion
Description
Autofocus with an Optimum Balance of Accuracy, Speed, Consistency and Reliability
Autofocus is supported subject to certain limitations (see table below for details). We are pleased to report that Panasonic Micro Four Thirds camera bodies are capable of autofocusing fast (large maximum aperture) lenses accurately. Although our first and foremost priority is accuracy, we are able to make great strides in autofocus speed as well.
Camera Body Compatibility List
Blackmagic: Micro Cinema Camera (BMMCC), Micro Studio Camera(BMMSC), Pocket Cinema Camera(BMPCC), Pocket Cinema Camera 4K(BMPCC4K)
JVC: GY-LS300
Olympus: E-M1, E-M1 Mark II, E-M5, E-M5 Mark II, E-M10, PEN-F, E-P5, E-PL3
Panasonic: GX1, GX7, GX8, GX8085, GH1, GH4, GH5, GH5s, G2, G3, G5, G7, GM1, GF3, AF100
Unlisted cameras have not been fully tested for compatibility.
Autofocus Lens Compatibility List
The following table lists lenses which has been tested. Other lenses not listed here typically works well, too.
Accurate
Tested by the community, thanks!
Accurate only on newer cameras such as Panasonic G7, GX8 and GX8085
Canon CN-E 18-80mm T4.4 Compact-Servo EF**Canon CN-E 70-200mm T4.4 Compact-Servo EF**Canon EF 8-15mm f4L USM Fisheye*Canon EF-S 17-55mm f2.8 IS USMCanon EF-S 18-55mm f3.5-5.6 IS IICanon CN-E 18-80mm T4.4L IS KAS S* (requires external power to autofocus)Canon EF-S 18-135mm f3.5-5.6 IS Nano USMCanon EF 20-35mm f3.5-4.5 USMCanon EF 24-105mm f4L IS USMCanon EF 28-80mm f3.5-5.6 IICanon EF 35-80mm f4-5.6Canon EF 40mm f2.8 STM*Canon EF 50mm f1.2L USMCanon EF 50mm f1.4 USMCanon EF 50mm f1.8 STM*Canon EF 70-200mm f2.8L IS II USM*Canon EF 70-300mm f4-5.6L IS USM*Canon EF 85mm f1.2L II USMCanon EF 100mm f2.8L IS Macro USM*Canon EF 100-400mm f4.5-5.6L IS USMCanon EF 100-400mm f4.5-5.6L IS II USM*Canon EF Extender 1.4x IIICanon EF Extender 2xSigma 18-125mm f3.8-5.6 DC HSMSigma 24-105mm f4 ArtTokina AT-X PRO 11-16mm f2.8 DX II
Canon EF 70-200mm f2.8L IS USM (Mark I)Canon EF 85mm f1.2L USM (Mark I)Canon EF 200mm f2.0L IS USMCanon EF 300mm f2.8L IS USM (Mark I)Canon EF 4002.8L IS USM (Mark I)
Canon EF 70-200mm f4L USM (non-IS)Canon EF 135mm f2L USMCanon EF 200mm f2.8L II USMCanon EF 300mm f4L IS USMCanon EF 400mm f5.6L USMSigma 18-35mm f1.8 DC ArtSigma 50-100mm f1.8 DC HSM Art 016*Tamron SP 15-30mm f2.8 VC USD A012*Tamron 18-270mm f3.5-6.3 VC PZD B008Tamron SP 45mm f1.8 VC USD F013*
Inaccurate
Require external USB power supply owing to high current consumption; AF inaccurate
Canon EF 28-70mm f3.5-4.5 IICanon EF 50mm f1.8 IICanon EF 100mm f2.8 Macro USMSigma 50mm f1.4 EX HSMTamron 18-250mm f3.5-6.3 Di II Macro A18Tamron 18-270mm f3.5-5.6 Di II VC B003Tamron SP 24-70mm f2.8 Di VC USD A007Tamron 28-300mm f3.5-6.3 XR Di Macro A06Tamron SP 70-200mm f2.8 Di VC USD A009*Tokina AT-X PRO 11-16mm f2.8 DX (I)
Tamron 28-300mm f3.5-6.3 XR Di VC A20Tamron 150-6005-6.3 VC USD A011*
Manual focus only
Not supported
Contax N lenses modified by ConurusTamron SP 17-50mm f2.8 VC B005Zeiss ZE lenses
Focus confirmation "chips"
* with smooth iris support
** CN-E Compact-Servo lens with some of MFT cameras may require external power to autofocus
Note 1: VC function of Tamron 28-3003.5-6.3 XR Di VC model A20 may not operate, due to usually high current requirement.
Manual Focus Lens Compatibility
Some improperly-made M42 screw mount adapters may short the electronic contacts of the Speed Booster and cause damage to the Speed Booster andor camera body.
Focus confirmation "chips" such as Dandelion are incompatible.
Many manual focus lenses (e.g. OM 282.8, OM 501.8, Leica R 153.5) have rear protrusions (spikes, levers, other appendages) which would damage the optics andor 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 adapterlens combination before using on Speed Booster. Scratches and damages caused by rear protrusions on Speed Booster are not covered by warranty.
List of manual focus lenses which REQUIRE MODIFICATION to be used on Speed Booster
Leica R
Super-Elmar-R 15mmElmarit R 282.8Elmarit R 352.8Summicron R 502
Nikon F
202.8 AI-S
Olympus OM
OM 183.5OM 212OM 213.5OM 282.8OM 501.8
Pentax K
Every Pentax K-mount lens has a protruding fin and an aperture lever. It does NOT fit.
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