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Metabones Canon EF Lens to Micro Four Thirds T CINE Speed Booster ULTRA 0.71x
AI ASSISTANT CHAT
Or ask about:
| Adapter type | speed booster |
| Adapter is for cameras | micro 4/3 |
| Adapter is for lenses | Canon EF |
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Metabones Canon EF Lens to Micro Four Thirds T CINE Speed Booster ULTRA 0.71x (MB_SPEF-m43-BT5)
The Speed Booster ULTRA M43 uses an advanced 5-element 4-group optical design incorporating ultra-high index tantalum-based optical glass. However, the new design is specifically optimized for the Micro Four Thirds sensor and filter stack, and as a result achieves an astonishing level of performance that sets a new standard for focal reducers.
Like the revolutionary original Metabones Speed Booster® announced in January 2013, the Speed Booster ULTRA M43 has a magnification of 0.71x, and so it effectively reduces the crop factor of mirrorless Micro Four Thirds mount cameras from 2.0x to 1.4x. However, the new ULTRA design makes very effective use of exotic materials at the furthest limit of glassmaking technology, and as a result is almost perfectly corrected for use with all fullframe SLR lenses regardless of aperture. The Speed Booster ULTRA M43 will also work extremely well with many DX and APS-C format lenses provided the image circle of the lens is large enough. Optical performance of the new Speed Boosters is so good that the MTF of any lens attached to it will be improved. Even the latest generation of ultra-high performance SLR lenses such as the Zeiss Otus series can be improved by adding a Speed Booster ULTRA M43.
Autofocus with an Optimum Balance of Accuracy, Speed and Consistency
New in Speed Booster ULTRA for Canon EF Mount to Micro Four Thirds is autofocus support, subject to certain limitations (see table above for details). We are pleased to report that Panasonic Micro Four Thirds camera bodies are capable of autofocusing accurately even if the maximum aperture of the Speed Booster and the lens combined is in the sub-f/1.0 range. Although our first and foremost priority is accuracy, we are able to make great strides in autofocus speed as well.
Camera Body Compatibility:
Blackmagic: Micro Cinema Camera, Pocket Cinema Camera
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, GX80/85, GH1, GH4, GH5, G2, G3, G5, G7, GM1, GF3, AF100
Autofocus Lens Compatibility
The following table lists lenses which has been tested. Other lenses not listed here typically works well, too.
Accurate | Tested by the community | Accurate only on newer cameras such as Panasonic G7, GX8 and GX80/85 |
Canon EF 8-15mm f/4L USM Fisheye* | Canon EF 70-200mm f/2.8L IS USM (Mark I) | Canon EF 70-200mm f/4L USM (non-IS) |
Inaccurate | Require external USB power supply owing to high current consumption; AF inaccurate | |
Canon EF 28-70mm f/3.5-4.5 II | Tamron 28-300mm f/3.5-6.3 XR Di VC A20 (note 1) | |
Does not fit, even after modification | Manual focus only | Not supported |
| Canon EF-S 18-135mm f/3.5-5.6 IS Nano USM | Contax N lenses modified by Conurus | Focus confirmation "chips" |
* with smooth iris support
Note 1: VC function of Tamron 28-300/3.5-6.3 XR Di VC model A20 may not operate, due to usually high current requirement.
