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Canon EF to MFT Speed Booster 0.64x

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Metabones Canon EF to Micro FourThirds T Speed Booster XL 0.64x (Black Matt) (p/n MB_SPEF-M43-BT3)

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metabones_mb_spef-m43-bt3 / MB_SPEF-M43-BT3

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Metabones Canon EF to Micro FourThirds T Speed Booster XL 0.64x (Black Matt) (p/n MB_SPEF-M43-BT3)
Canon EF to MFT Speed Booster 0.64x
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Canon EF to MFT Speed Booster 0.64x

At a glance
Metabones Canon EF to Micro FourThirds T Speed Booster XL 0.64x (Black Matt) (p/n MB_SPEF-M43-BT3)

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£515
€588.03

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Panasonic 1860mAh Battery

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Panasonic DMW-BLF19E (DMWBLF19E) Rechargeable Battery Pack (1860mAh) for DMC-GH3 / DMC-GH4 / DMC-GH5 Series Digital Cameras

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Product Details

Overview
Metabones Canon EF to Micro FourThirds T Speed Booster XL 0.64x (Black Matt) (p/n MB_SPEF-M43-BT3). 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...
Summary
Crop Factor: 1.28x
Lens Mount: Canon EF
Magnification: 0.64x
Mount: MFT

About the Canon EF to MFT Speed Booster 0.64x

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.

Compatibility

The Speed Booster XL 0.64x is similar to the Blackmagic-specific 0.64x BMCC Speed Booster (MB_SPEF-BMCC-BM1), but has been completely re-designed to meet the following requirements:

  • The working distance has increased by 1mm to permit use on the Panasonic GH4 and a number of other Micro Four Thirds cameras without touching the flexible outer cover of the camera’s shutter mechanism.
  • The optics are optimized for a standard Micro Four Thirds filter stack thickness of 4mm rather than the 2.4mm found in Blackmagic cameras.
  • The image circle diameter has been increased to 21.63mm so that the full 17.3mm x 13mm Four Thirds format is covered.  This has been achieved while maintaining unusually high image quality over the 17.4mm image circle used by the Panasonic GH4 in its Cinema 4k video mode.
Magnification: 0.64x
Crop Factor for Full Micro Four Thirds format: 1.28x
Crop Factor with GH4 in Cinema 4k (4096 x 2160) Video Mode: 1.5x
Maximum Output Aperture: f/0.80 (with f/1.2 lens attached)
Rectilinear Distortion: 0.8%
Lens Elements/Groups: 6/4
Length Reduction: 6.2 mm
Camera Mount: Micro Four Thirds
Image Format: 17.3 mm x 13.0 mm (full Micro Four Thirds format)
  • Increase maximum aperture by 11/3 stops
  • Increase MTF.
  • Makes lens 0.64x wider.
  • 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 interior is painted with flocking coating to further reduce the internal reflection. 
  • The tripod foot is detachable and compatible with Arca Swiss, Markins and Photo Clam ball heads.
  • Support Panasonic GH4, GH3, G3, G5, G6, G10, GF3, GF5, GF6, GX1, Olympus E-PL7, Blackmagic Cinema Camera with Micro Four Thirds mount**, Blackmagic Pocket Cinema Camera***

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What others think

Overall Rating
[[review_quality]] stars
Rated 4.67 out of 5 based on 3 reviews
5 Stars
(2)
4 Stars
(1)
3 Stars
(0)
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Reviews
Was available in the store. best for EF full frame lenses. I love it, and mainly use it for my Rokinon Cine lenses
5 stars

Arpad Csoke on 2017-08-09


Bit pricey, but works like a dream
4 stars

Pasi Sauna-Aho on 2016-08-25


Excellent
5 stars

Feefo on 2015-09-30


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