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Metabones Canon EF Lens to Micro Four Thirds T Speed Booster XL 0.64x MB_SPEF-m43-BT3
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- Canon EF Lens to Micro 4/3 Body
- Supports In-Camera Aperture Control
- 0.64x Micro 4/3 Crop Factor Compensation
- 1.3-Stop Increase in Lens Apertures
- 6 Optical Elements in 4 Groups
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|Shipping||FREE Shipping||FREE Shipping||FREE Shipping||FREE Shipping||FREE Shipping||FREE Shipping|
|Item Dimensions||6.7 x 3.5 x 7.5 cm||12.1 x 7.8 x 7.8 cm||6.7 x 7.4 x 5.8 cm||2.55 x 6.3 x 6.3 cm||5.2 x 6.1 x 6.1 cm||7.1 x 6.6 x 6.6 cm|
|Item Weight||168 grams||0.81 kg||305 grams||87 grams||125 grams||—|
|Max Focal Length||50 mm||35 mm||35||20 mm||25 mm||60 mm|
|Min Focal Length||—||18 mm||12||20 mm||25 mm||12 mm|
|Mounting Type||—||Canon EF / EF-S||Micro Four Thirds||Micro FourThirds||Micro FourThirds||Micro FourThirds|
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A new Micro-4/3 mount Speed Booster adapter designed exclusively for the Panasonic GH4 and other selected Micro Four Thirds cameras (refer to the below camera compatbility table), with a magnification of 0.64x. The Speed Booster XL 0.64x uses an advanced 6-element optical design to achieve extraordinary optical performance at apertures up to an incredible f/0.80, a new record for Micro Four Thirds format. The new Speed Booster XL 0.64x reduces the full-frame crop factor of the Panasonic GH4 from 2.0x to 1.28x, thus effectively transforming these cameras into APS-H format. When the GH4 is used in Cinema 4k video mode the horizontal full frame crop factor is reduced from 2.34x to 1.50x, thus effectively transforming the GH4 into a super-35 format 4k cine camera. In addition, the speed of any attached lens is increased by 11/3 stops, with a maximum output aperture of f/0.80 when an f/1.2 lens is used. For example, a 50mm f/1.2 becomes a 32mm f/0.80, which is the fastest aperture available for full size Micro Four Thirds format.
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Most helpful customer reviews on Amazon.com
Example - turned my f/4.0 canon 11-24 superwide into a f2.5 killer wide lens
It allows me to expand the usage of my Canon wide angle zoom lenses paired with my M43 GX8 camera.
Such as 11-24mm f4L, 16-35mm f2.8L II, thanks for the equivalent magnification factor 1.28 (2*0.64) with this adapter.
And it significantly increases my lens aperture by 1 2/3 faster.
My 11-24mm f4 becomes 14-31mm/f2.8 and 16-35mm becomes 20-45mm/f1.8 equivalent to 35mm full frame lens!!
The only cons is when I paired my Canon 11-24mm F4 with M43 GX8, it is hard to get auto focused at 11mm.
Other than that, I am very satisfactory with my purchase.
But it does not work with my Olympus E-M1 Mark II !